Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1 | /* parsermodule.c |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 3 | * Copyright 1995-1996 by Fred L. Drake, Jr. and Virginia Polytechnic |
| 4 | * Institute and State University, Blacksburg, Virginia, USA. |
| 5 | * Portions copyright 1991-1995 by Stichting Mathematisch Centrum, |
| 6 | * Amsterdam, The Netherlands. Copying is permitted under the terms |
| 7 | * associated with the main Python distribution, with the additional |
| 8 | * restriction that this additional notice be included and maintained |
| 9 | * on all distributed copies. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 10 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 11 | * This module serves to replace the original parser module written |
| 12 | * by Guido. The functionality is not matched precisely, but the |
| 13 | * original may be implemented on top of this. This is desirable |
| 14 | * since the source of the text to be parsed is now divorced from |
| 15 | * this interface. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 16 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 17 | * Unlike the prior interface, the ability to give a parse tree |
| 18 | * produced by Python code as a tuple to the compiler is enabled by |
| 19 | * this module. See the documentation for more details. |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 20 | * |
| 21 | * I've added some annotations that help with the lint code-checking |
| 22 | * program, but they're not complete by a long shot. The real errors |
| 23 | * that lint detects are gone, but there are still warnings with |
| 24 | * Py_[X]DECREF() and Py_[X]INCREF() macros. The lint annotations |
| 25 | * look like "NOTE(...)". |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 26 | */ |
| 27 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 28 | #include "Python.h" /* general Python API */ |
| 29 | #include "graminit.h" /* symbols defined in the grammar */ |
| 30 | #include "node.h" /* internal parser structure */ |
Fred Drake | 8b55b2d | 2001-12-05 22:10:44 +0000 | [diff] [blame] | 31 | #include "errcode.h" /* error codes for PyNode_*() */ |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 32 | #include "token.h" /* token definitions */ |
| 33 | /* ISTERMINAL() / ISNONTERMINAL() */ |
| 34 | #include "compile.h" /* PyNode_Compile() */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 35 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 36 | #ifdef lint |
| 37 | #include <note.h> |
| 38 | #else |
| 39 | #define NOTE(x) |
| 40 | #endif |
| 41 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 42 | /* String constants used to initialize module attributes. |
| 43 | * |
| 44 | */ |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 45 | static char parser_copyright_string[] = |
| 46 | "Copyright 1995-1996 by Virginia Polytechnic Institute & State\n\ |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 47 | University, Blacksburg, Virginia, USA, and Fred L. Drake, Jr., Reston,\n\ |
| 48 | Virginia, USA. Portions copyright 1991-1995 by Stichting Mathematisch\n\ |
| 49 | Centrum, Amsterdam, The Netherlands."; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 50 | |
| 51 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 52 | PyDoc_STRVAR(parser_doc_string, |
| 53 | "This is an interface to Python's internal parser."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 54 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 55 | static char parser_version_string[] = "0.5"; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 56 | |
| 57 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 58 | typedef PyObject* (*SeqMaker) (Py_ssize_t length); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 59 | typedef int (*SeqInserter) (PyObject* sequence, |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 60 | Py_ssize_t index, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 61 | PyObject* element); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 62 | |
Thomas Wouters | 7e47402 | 2000-07-16 12:04:32 +0000 | [diff] [blame] | 63 | /* The function below is copyrighted by Stichting Mathematisch Centrum. The |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 64 | * original copyright statement is included below, and continues to apply |
| 65 | * in full to the function immediately following. All other material is |
| 66 | * original, copyrighted by Fred L. Drake, Jr. and Virginia Polytechnic |
| 67 | * Institute and State University. Changes were made to comply with the |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 68 | * new naming conventions. Added arguments to provide support for creating |
| 69 | * lists as well as tuples, and optionally including the line numbers. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 70 | */ |
| 71 | |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 72 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 73 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 74 | node2tuple(node *n, /* node to convert */ |
| 75 | SeqMaker mkseq, /* create sequence */ |
| 76 | SeqInserter addelem, /* func. to add elem. in seq. */ |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 77 | int lineno, /* include line numbers? */ |
| 78 | int col_offset) /* include column offsets? */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 79 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 80 | if (n == NULL) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 81 | Py_INCREF(Py_None); |
| 82 | return (Py_None); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 83 | } |
| 84 | if (ISNONTERMINAL(TYPE(n))) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 85 | int i; |
| 86 | PyObject *v; |
| 87 | PyObject *w; |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 88 | |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 89 | v = mkseq(1 + NCH(n) + (TYPE(n) == encoding_decl)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 90 | if (v == NULL) |
| 91 | return (v); |
| 92 | w = PyInt_FromLong(TYPE(n)); |
| 93 | if (w == NULL) { |
| 94 | Py_DECREF(v); |
| 95 | return ((PyObject*) NULL); |
| 96 | } |
| 97 | (void) addelem(v, 0, w); |
| 98 | for (i = 0; i < NCH(n); i++) { |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 99 | w = node2tuple(CHILD(n, i), mkseq, addelem, lineno, col_offset); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 100 | if (w == NULL) { |
| 101 | Py_DECREF(v); |
| 102 | return ((PyObject*) NULL); |
| 103 | } |
| 104 | (void) addelem(v, i+1, w); |
| 105 | } |
Tim Peters | 6a62725 | 2003-07-21 14:25:23 +0000 | [diff] [blame] | 106 | |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 107 | if (TYPE(n) == encoding_decl) |
| 108 | (void) addelem(v, i+1, PyString_FromString(STR(n))); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 109 | return (v); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 110 | } |
| 111 | else if (ISTERMINAL(TYPE(n))) { |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 112 | PyObject *result = mkseq(2 + lineno + col_offset); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 113 | if (result != NULL) { |
| 114 | (void) addelem(result, 0, PyInt_FromLong(TYPE(n))); |
| 115 | (void) addelem(result, 1, PyString_FromString(STR(n))); |
| 116 | if (lineno == 1) |
| 117 | (void) addelem(result, 2, PyInt_FromLong(n->n_lineno)); |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 118 | if (col_offset == 1) |
| 119 | (void) addelem(result, 3, PyInt_FromLong(n->n_col_offset)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 120 | } |
| 121 | return (result); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 122 | } |
| 123 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 124 | PyErr_SetString(PyExc_SystemError, |
| 125 | "unrecognized parse tree node type"); |
| 126 | return ((PyObject*) NULL); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 127 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 128 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 129 | /* |
| 130 | * End of material copyrighted by Stichting Mathematisch Centrum. |
| 131 | */ |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 132 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 133 | |
| 134 | |
| 135 | /* There are two types of intermediate objects we're interested in: |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 136 | * 'eval' and 'exec' types. These constants can be used in the st_type |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 137 | * field of the object type to identify which any given object represents. |
| 138 | * These should probably go in an external header to allow other extensions |
| 139 | * to use them, but then, we really should be using C++ too. ;-) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 140 | */ |
| 141 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 142 | #define PyST_EXPR 1 |
| 143 | #define PyST_SUITE 2 |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 144 | |
| 145 | |
| 146 | /* These are the internal objects and definitions required to implement the |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 147 | * ST type. Most of the internal names are more reminiscent of the 'old' |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 148 | * naming style, but the code uses the new naming convention. |
| 149 | */ |
| 150 | |
| 151 | static PyObject* |
| 152 | parser_error = 0; |
| 153 | |
| 154 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 155 | typedef struct { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 156 | PyObject_HEAD /* standard object header */ |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 157 | node* st_node; /* the node* returned by the parser */ |
| 158 | int st_type; /* EXPR or SUITE ? */ |
| 159 | } PyST_Object; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 160 | |
| 161 | |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 162 | static void parser_free(PyST_Object *st); |
| 163 | static int parser_compare(PyST_Object *left, PyST_Object *right); |
Martin v. Löwis | b79afb6 | 2006-02-27 17:01:22 +0000 | [diff] [blame] | 164 | static PyObject *parser_getattr(PyObject *self, char *name); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 165 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 166 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 167 | static |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 168 | PyTypeObject PyST_Type = { |
Guido van Rossum | 3c8c598 | 1998-05-29 02:58:20 +0000 | [diff] [blame] | 169 | PyObject_HEAD_INIT(NULL) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 170 | 0, |
Guido van Rossum | 1464839 | 2001-12-08 18:02:58 +0000 | [diff] [blame] | 171 | "parser.st", /* tp_name */ |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 172 | (int) sizeof(PyST_Object), /* tp_basicsize */ |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 173 | 0, /* tp_itemsize */ |
| 174 | (destructor)parser_free, /* tp_dealloc */ |
| 175 | 0, /* tp_print */ |
| 176 | parser_getattr, /* tp_getattr */ |
| 177 | 0, /* tp_setattr */ |
| 178 | (cmpfunc)parser_compare, /* tp_compare */ |
| 179 | 0, /* tp_repr */ |
| 180 | 0, /* tp_as_number */ |
| 181 | 0, /* tp_as_sequence */ |
| 182 | 0, /* tp_as_mapping */ |
| 183 | 0, /* tp_hash */ |
| 184 | 0, /* tp_call */ |
| 185 | 0, /* tp_str */ |
| 186 | 0, /* tp_getattro */ |
| 187 | 0, /* tp_setattro */ |
Fred Drake | 69b9ae4 | 1997-05-23 04:04:17 +0000 | [diff] [blame] | 188 | |
| 189 | /* Functions to access object as input/output buffer */ |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 190 | 0, /* tp_as_buffer */ |
Fred Drake | 69b9ae4 | 1997-05-23 04:04:17 +0000 | [diff] [blame] | 191 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 192 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
Fred Drake | 69b9ae4 | 1997-05-23 04:04:17 +0000 | [diff] [blame] | 193 | |
| 194 | /* __doc__ */ |
| 195 | "Intermediate representation of a Python parse tree." |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 196 | }; /* PyST_Type */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 197 | |
| 198 | |
| 199 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 200 | parser_compare_nodes(node *left, node *right) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 201 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 202 | int j; |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 203 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 204 | if (TYPE(left) < TYPE(right)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 205 | return (-1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 206 | |
| 207 | if (TYPE(right) < TYPE(left)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 208 | return (1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 209 | |
| 210 | if (ISTERMINAL(TYPE(left))) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 211 | return (strcmp(STR(left), STR(right))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 212 | |
| 213 | if (NCH(left) < NCH(right)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 214 | return (-1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 215 | |
| 216 | if (NCH(right) < NCH(left)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 217 | return (1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 218 | |
| 219 | for (j = 0; j < NCH(left); ++j) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 220 | int v = parser_compare_nodes(CHILD(left, j), CHILD(right, j)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 221 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 222 | if (v != 0) |
| 223 | return (v); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 224 | } |
| 225 | return (0); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 226 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 227 | |
| 228 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 229 | /* int parser_compare(PyST_Object* left, PyST_Object* right) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 230 | * |
| 231 | * Comparison function used by the Python operators ==, !=, <, >, <=, >= |
| 232 | * This really just wraps a call to parser_compare_nodes() with some easy |
| 233 | * checks and protection code. |
| 234 | * |
| 235 | */ |
| 236 | static int |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 237 | parser_compare(PyST_Object *left, PyST_Object *right) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 238 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 239 | if (left == right) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 240 | return (0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 241 | |
| 242 | if ((left == 0) || (right == 0)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 243 | return (-1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 244 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 245 | return (parser_compare_nodes(left->st_node, right->st_node)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 246 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 247 | |
| 248 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 249 | /* parser_newstobject(node* st) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 250 | * |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 251 | * Allocates a new Python object representing an ST. This is simply the |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 252 | * 'wrapper' object that holds a node* and allows it to be passed around in |
| 253 | * Python code. |
| 254 | * |
| 255 | */ |
| 256 | static PyObject* |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 257 | parser_newstobject(node *st, int type) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 258 | { |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 259 | PyST_Object* o = PyObject_New(PyST_Object, &PyST_Type); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 260 | |
| 261 | if (o != 0) { |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 262 | o->st_node = st; |
| 263 | o->st_type = type; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 264 | } |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 265 | else { |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 266 | PyNode_Free(st); |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 267 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 268 | return ((PyObject*)o); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 269 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 270 | |
| 271 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 272 | /* void parser_free(PyST_Object* st) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 273 | * |
| 274 | * This is called by a del statement that reduces the reference count to 0. |
| 275 | * |
| 276 | */ |
| 277 | static void |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 278 | parser_free(PyST_Object *st) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 279 | { |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 280 | PyNode_Free(st->st_node); |
| 281 | PyObject_Del(st); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 282 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 283 | |
| 284 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 285 | /* parser_st2tuple(PyObject* self, PyObject* args, PyObject* kw) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 286 | * |
| 287 | * This provides conversion from a node* to a tuple object that can be |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 288 | * returned to the Python-level caller. The ST object is not modified. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 289 | * |
| 290 | */ |
| 291 | static PyObject* |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 292 | parser_st2tuple(PyST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 293 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 294 | PyObject *line_option = 0; |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 295 | PyObject *col_option = 0; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 296 | PyObject *res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 297 | int ok; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 298 | |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 299 | static char *keywords[] = {"ast", "line_info", "col_info", NULL}; |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 300 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 301 | if (self == NULL) { |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 302 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!|OO:st2tuple", keywords, |
| 303 | &PyST_Type, &self, &line_option, |
| 304 | &col_option); |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 305 | } |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 306 | else |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 307 | ok = PyArg_ParseTupleAndKeywords(args, kw, "|OO:totuple", &keywords[1], |
| 308 | &line_option, &col_option); |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 309 | if (ok != 0) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 310 | int lineno = 0; |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 311 | int col_offset = 0; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 312 | if (line_option != NULL) { |
| 313 | lineno = (PyObject_IsTrue(line_option) != 0) ? 1 : 0; |
| 314 | } |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 315 | if (col_option != NULL) { |
| 316 | col_offset = (PyObject_IsTrue(col_option) != 0) ? 1 : 0; |
| 317 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 318 | /* |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 319 | * Convert ST into a tuple representation. Use Guido's function, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 320 | * since it's known to work already. |
| 321 | */ |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 322 | res = node2tuple(((PyST_Object*)self)->st_node, |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 323 | PyTuple_New, PyTuple_SetItem, lineno, col_offset); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 324 | } |
| 325 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 326 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 327 | |
| 328 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 329 | /* parser_st2list(PyObject* self, PyObject* args, PyObject* kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 330 | * |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 331 | * This provides conversion from a node* to a list object that can be |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 332 | * returned to the Python-level caller. The ST object is not modified. |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 333 | * |
| 334 | */ |
| 335 | static PyObject* |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 336 | parser_st2list(PyST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 337 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 338 | PyObject *line_option = 0; |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 339 | PyObject *col_option = 0; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 340 | PyObject *res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 341 | int ok; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 342 | |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 343 | static char *keywords[] = {"ast", "line_info", "col_info", NULL}; |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 344 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 345 | if (self == NULL) |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 346 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!|OO:st2list", keywords, |
| 347 | &PyST_Type, &self, &line_option, |
| 348 | &col_option); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 349 | else |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 350 | ok = PyArg_ParseTupleAndKeywords(args, kw, "|OO:tolist", &keywords[1], |
| 351 | &line_option, &col_option); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 352 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 353 | int lineno = 0; |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 354 | int col_offset = 0; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 355 | if (line_option != 0) { |
| 356 | lineno = PyObject_IsTrue(line_option) ? 1 : 0; |
| 357 | } |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 358 | if (col_option != NULL) { |
| 359 | col_offset = (PyObject_IsTrue(col_option) != 0) ? 1 : 0; |
| 360 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 361 | /* |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 362 | * Convert ST into a tuple representation. Use Guido's function, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 363 | * since it's known to work already. |
| 364 | */ |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 365 | res = node2tuple(self->st_node, |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 366 | PyList_New, PyList_SetItem, lineno, col_offset); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 367 | } |
| 368 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 369 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 370 | |
| 371 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 372 | /* parser_compilest(PyObject* self, PyObject* args) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 373 | * |
| 374 | * This function creates code objects from the parse tree represented by |
| 375 | * the passed-in data object. An optional file name is passed in as well. |
| 376 | * |
| 377 | */ |
| 378 | static PyObject* |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 379 | parser_compilest(PyST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 380 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 381 | PyObject* res = 0; |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 382 | char* str = "<syntax-tree>"; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 383 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 384 | |
Martin v. Löwis | b79afb6 | 2006-02-27 17:01:22 +0000 | [diff] [blame] | 385 | static char *keywords[] = {"ast", "filename", NULL}; |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 386 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 387 | if (self == NULL) |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 388 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!|s:compilest", keywords, |
| 389 | &PyST_Type, &self, &str); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 390 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 391 | ok = PyArg_ParseTupleAndKeywords(args, kw, "|s:compile", &keywords[1], |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 392 | &str); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 393 | |
| 394 | if (ok) |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 395 | res = (PyObject *)PyNode_Compile(self->st_node, str); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 396 | |
| 397 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 398 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 399 | |
| 400 | |
| 401 | /* PyObject* parser_isexpr(PyObject* self, PyObject* args) |
| 402 | * PyObject* parser_issuite(PyObject* self, PyObject* args) |
| 403 | * |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 404 | * Checks the passed-in ST object to determine if it is an expression or |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 405 | * a statement suite, respectively. The return is a Python truth value. |
| 406 | * |
| 407 | */ |
| 408 | static PyObject* |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 409 | parser_isexpr(PyST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 410 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 411 | PyObject* res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 412 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 413 | |
Martin v. Löwis | b79afb6 | 2006-02-27 17:01:22 +0000 | [diff] [blame] | 414 | static char *keywords[] = {"ast", NULL}; |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 415 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 416 | if (self == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 417 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!:isexpr", keywords, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 418 | &PyST_Type, &self); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 419 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 420 | ok = PyArg_ParseTupleAndKeywords(args, kw, ":isexpr", &keywords[1]); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 421 | |
| 422 | if (ok) { |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 423 | /* Check to see if the ST represents an expression or not. */ |
| 424 | res = (self->st_type == PyST_EXPR) ? Py_True : Py_False; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 425 | Py_INCREF(res); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 426 | } |
| 427 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 428 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 429 | |
| 430 | |
| 431 | static PyObject* |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 432 | parser_issuite(PyST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 433 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 434 | PyObject* res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 435 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 436 | |
Martin v. Löwis | b79afb6 | 2006-02-27 17:01:22 +0000 | [diff] [blame] | 437 | static char *keywords[] = {"ast", NULL}; |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 438 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 439 | if (self == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 440 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!:issuite", keywords, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 441 | &PyST_Type, &self); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 442 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 443 | ok = PyArg_ParseTupleAndKeywords(args, kw, ":issuite", &keywords[1]); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 444 | |
| 445 | if (ok) { |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 446 | /* Check to see if the ST represents an expression or not. */ |
| 447 | res = (self->st_type == PyST_EXPR) ? Py_False : Py_True; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 448 | Py_INCREF(res); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 449 | } |
| 450 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 451 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 452 | |
| 453 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 454 | #define PUBLIC_METHOD_TYPE (METH_VARARGS|METH_KEYWORDS) |
| 455 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 456 | static PyMethodDef |
| 457 | parser_methods[] = { |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 458 | {"compile", (PyCFunction)parser_compilest, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 459 | PyDoc_STR("Compile this ST object into a code object.")}, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 460 | {"isexpr", (PyCFunction)parser_isexpr, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 461 | PyDoc_STR("Determines if this ST object was created from an expression.")}, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 462 | {"issuite", (PyCFunction)parser_issuite, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 463 | PyDoc_STR("Determines if this ST object was created from a suite.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 464 | {"tolist", (PyCFunction)parser_st2list, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 465 | PyDoc_STR("Creates a list-tree representation of this ST.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 466 | {"totuple", (PyCFunction)parser_st2tuple, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 467 | PyDoc_STR("Creates a tuple-tree representation of this ST.")}, |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 468 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 469 | {NULL, NULL, 0, NULL} |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 470 | }; |
| 471 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 472 | |
| 473 | static PyObject* |
Martin v. Löwis | b79afb6 | 2006-02-27 17:01:22 +0000 | [diff] [blame] | 474 | parser_getattr(PyObject *self, char *name) |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 475 | { |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 476 | return (Py_FindMethod(parser_methods, self, name)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 477 | } |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 478 | |
| 479 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 480 | /* err_string(char* message) |
| 481 | * |
| 482 | * Sets the error string for an exception of type ParserError. |
| 483 | * |
| 484 | */ |
| 485 | static void |
Peter Schneider-Kamp | 286da3b | 2000-07-10 12:43:58 +0000 | [diff] [blame] | 486 | err_string(char *message) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 487 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 488 | PyErr_SetString(parser_error, message); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 489 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 490 | |
| 491 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 492 | /* PyObject* parser_do_parse(PyObject* args, int type) |
| 493 | * |
| 494 | * Internal function to actually execute the parse and return the result if |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 495 | * successful or set an exception if not. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 496 | * |
| 497 | */ |
| 498 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 499 | parser_do_parse(PyObject *args, PyObject *kw, char *argspec, int type) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 500 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 501 | char* string = 0; |
| 502 | PyObject* res = 0; |
| 503 | |
Martin v. Löwis | b79afb6 | 2006-02-27 17:01:22 +0000 | [diff] [blame] | 504 | static char *keywords[] = {"source", NULL}; |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 505 | |
| 506 | if (PyArg_ParseTupleAndKeywords(args, kw, argspec, keywords, &string)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 507 | node* n = PyParser_SimpleParseString(string, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 508 | (type == PyST_EXPR) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 509 | ? eval_input : file_input); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 510 | |
Jeremy Hylton | accb62b | 2002-12-31 18:17:44 +0000 | [diff] [blame] | 511 | if (n) |
| 512 | res = parser_newstobject(n, type); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 513 | } |
| 514 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 515 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 516 | |
| 517 | |
| 518 | /* PyObject* parser_expr(PyObject* self, PyObject* args) |
| 519 | * PyObject* parser_suite(PyObject* self, PyObject* args) |
| 520 | * |
| 521 | * External interfaces to the parser itself. Which is called determines if |
| 522 | * the parser attempts to recognize an expression ('eval' form) or statement |
| 523 | * suite ('exec' form). The real work is done by parser_do_parse() above. |
| 524 | * |
| 525 | */ |
| 526 | static PyObject* |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 527 | parser_expr(PyST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 528 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 529 | NOTE(ARGUNUSED(self)) |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 530 | return (parser_do_parse(args, kw, "s:expr", PyST_EXPR)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 531 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 532 | |
| 533 | |
| 534 | static PyObject* |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 535 | parser_suite(PyST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 536 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 537 | NOTE(ARGUNUSED(self)) |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 538 | return (parser_do_parse(args, kw, "s:suite", PyST_SUITE)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 539 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 540 | |
| 541 | |
| 542 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 543 | /* This is the messy part of the code. Conversion from a tuple to an ST |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 544 | * object requires that the input tuple be valid without having to rely on |
| 545 | * catching an exception from the compiler. This is done to allow the |
| 546 | * compiler itself to remain fast, since most of its input will come from |
| 547 | * the parser directly, and therefore be known to be syntactically correct. |
| 548 | * This validation is done to ensure that we don't core dump the compile |
| 549 | * phase, returning an exception instead. |
| 550 | * |
| 551 | * Two aspects can be broken out in this code: creating a node tree from |
| 552 | * the tuple passed in, and verifying that it is indeed valid. It may be |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 553 | * advantageous to expand the number of ST types to include funcdefs and |
| 554 | * lambdadefs to take advantage of the optimizer, recognizing those STs |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 555 | * here. They are not necessary, and not quite as useful in a raw form. |
| 556 | * For now, let's get expressions and suites working reliably. |
| 557 | */ |
| 558 | |
| 559 | |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 560 | static node* build_node_tree(PyObject *tuple); |
| 561 | static int validate_expr_tree(node *tree); |
| 562 | static int validate_file_input(node *tree); |
Michael W. Hudson | df1252d | 2003-02-08 18:05:10 +0000 | [diff] [blame] | 563 | static int validate_encoding_decl(node *tree); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 564 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 565 | /* PyObject* parser_tuple2st(PyObject* self, PyObject* args) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 566 | * |
| 567 | * This is the public function, called from the Python code. It receives a |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 568 | * single tuple object from the caller, and creates an ST object if the |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 569 | * tuple can be validated. It does this by checking the first code of the |
| 570 | * tuple, and, if acceptable, builds the internal representation. If this |
| 571 | * step succeeds, the internal representation is validated as fully as |
| 572 | * possible with the various validate_*() routines defined below. |
| 573 | * |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 574 | * This function must be changed if support is to be added for PyST_FRAGMENT |
| 575 | * ST objects. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 576 | * |
| 577 | */ |
| 578 | static PyObject* |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 579 | parser_tuple2st(PyST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 580 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 581 | NOTE(ARGUNUSED(self)) |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 582 | PyObject *st = 0; |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 583 | PyObject *tuple; |
| 584 | node *tree; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 585 | |
Martin v. Löwis | b79afb6 | 2006-02-27 17:01:22 +0000 | [diff] [blame] | 586 | static char *keywords[] = {"sequence", NULL}; |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 587 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 588 | if (!PyArg_ParseTupleAndKeywords(args, kw, "O:sequence2st", keywords, |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 589 | &tuple)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 590 | return (0); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 591 | if (!PySequence_Check(tuple)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 592 | PyErr_SetString(PyExc_ValueError, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 593 | "sequence2st() requires a single sequence argument"); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 594 | return (0); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 595 | } |
| 596 | /* |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 597 | * Convert the tree to the internal form before checking it. |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 598 | */ |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 599 | tree = build_node_tree(tuple); |
| 600 | if (tree != 0) { |
| 601 | int start_sym = TYPE(tree); |
| 602 | if (start_sym == eval_input) { |
| 603 | /* Might be an eval form. */ |
| 604 | if (validate_expr_tree(tree)) |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 605 | st = parser_newstobject(tree, PyST_EXPR); |
Fred Drake | 8b55b2d | 2001-12-05 22:10:44 +0000 | [diff] [blame] | 606 | else |
| 607 | PyNode_Free(tree); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 608 | } |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 609 | else if (start_sym == file_input) { |
| 610 | /* This looks like an exec form so far. */ |
| 611 | if (validate_file_input(tree)) |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 612 | st = parser_newstobject(tree, PyST_SUITE); |
Fred Drake | 8b55b2d | 2001-12-05 22:10:44 +0000 | [diff] [blame] | 613 | else |
| 614 | PyNode_Free(tree); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 615 | } |
Michael W. Hudson | df1252d | 2003-02-08 18:05:10 +0000 | [diff] [blame] | 616 | else if (start_sym == encoding_decl) { |
| 617 | /* This looks like an encoding_decl so far. */ |
| 618 | if (validate_encoding_decl(tree)) |
| 619 | st = parser_newstobject(tree, PyST_SUITE); |
| 620 | else |
| 621 | PyNode_Free(tree); |
| 622 | } |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 623 | else { |
| 624 | /* This is a fragment, at best. */ |
| 625 | PyNode_Free(tree); |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 626 | err_string("parse tree does not use a valid start symbol"); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 627 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 628 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 629 | /* Make sure we throw an exception on all errors. We should never |
| 630 | * get this, but we'd do well to be sure something is done. |
| 631 | */ |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 632 | if (st == NULL && !PyErr_Occurred()) |
| 633 | err_string("unspecified ST error occurred"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 634 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 635 | return st; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 636 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 637 | |
| 638 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 639 | /* node* build_node_children() |
| 640 | * |
| 641 | * Iterate across the children of the current non-terminal node and build |
| 642 | * their structures. If successful, return the root of this portion of |
| 643 | * the tree, otherwise, 0. Any required exception will be specified already, |
| 644 | * and no memory will have been deallocated. |
| 645 | * |
| 646 | */ |
| 647 | static node* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 648 | build_node_children(PyObject *tuple, node *root, int *line_num) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 649 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 650 | Py_ssize_t len = PyObject_Size(tuple); |
| 651 | Py_ssize_t i; |
| 652 | int err; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 653 | |
| 654 | for (i = 1; i < len; ++i) { |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 655 | /* elem must always be a sequence, however simple */ |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 656 | PyObject* elem = PySequence_GetItem(tuple, i); |
| 657 | int ok = elem != NULL; |
| 658 | long type = 0; |
| 659 | char *strn = 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 660 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 661 | if (ok) |
| 662 | ok = PySequence_Check(elem); |
| 663 | if (ok) { |
| 664 | PyObject *temp = PySequence_GetItem(elem, 0); |
| 665 | if (temp == NULL) |
| 666 | ok = 0; |
| 667 | else { |
| 668 | ok = PyInt_Check(temp); |
| 669 | if (ok) |
| 670 | type = PyInt_AS_LONG(temp); |
| 671 | Py_DECREF(temp); |
| 672 | } |
| 673 | } |
| 674 | if (!ok) { |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 675 | PyObject *err = Py_BuildValue("os", elem, |
| 676 | "Illegal node construct."); |
| 677 | PyErr_SetObject(parser_error, err); |
| 678 | Py_XDECREF(err); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 679 | Py_XDECREF(elem); |
| 680 | return (0); |
| 681 | } |
| 682 | if (ISTERMINAL(type)) { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 683 | Py_ssize_t len = PyObject_Size(elem); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 684 | PyObject *temp; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 685 | |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 686 | if ((len != 2) && (len != 3)) { |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 687 | err_string("terminal nodes must have 2 or 3 entries"); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 688 | return 0; |
| 689 | } |
| 690 | temp = PySequence_GetItem(elem, 1); |
| 691 | if (temp == NULL) |
| 692 | return 0; |
| 693 | if (!PyString_Check(temp)) { |
| 694 | PyErr_Format(parser_error, |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 695 | "second item in terminal node must be a string," |
| 696 | " found %s", |
Guido van Rossum | fc29646 | 2003-04-09 17:53:22 +0000 | [diff] [blame] | 697 | temp->ob_type->tp_name); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 698 | Py_DECREF(temp); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 699 | return 0; |
| 700 | } |
| 701 | if (len == 3) { |
| 702 | PyObject *o = PySequence_GetItem(elem, 2); |
| 703 | if (o != NULL) { |
| 704 | if (PyInt_Check(o)) |
| 705 | *line_num = PyInt_AS_LONG(o); |
| 706 | else { |
| 707 | PyErr_Format(parser_error, |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 708 | "third item in terminal node must be an" |
| 709 | " integer, found %s", |
Guido van Rossum | fc29646 | 2003-04-09 17:53:22 +0000 | [diff] [blame] | 710 | temp->ob_type->tp_name); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 711 | Py_DECREF(o); |
| 712 | Py_DECREF(temp); |
| 713 | return 0; |
| 714 | } |
| 715 | Py_DECREF(o); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 716 | } |
| 717 | } |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 718 | len = PyString_GET_SIZE(temp) + 1; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 719 | strn = (char *)PyObject_MALLOC(len); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 720 | if (strn != NULL) |
| 721 | (void) memcpy(strn, PyString_AS_STRING(temp), len); |
| 722 | Py_DECREF(temp); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 723 | } |
| 724 | else if (!ISNONTERMINAL(type)) { |
| 725 | /* |
| 726 | * It has to be one or the other; this is an error. |
| 727 | * Throw an exception. |
| 728 | */ |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 729 | PyObject *err = Py_BuildValue("os", elem, "unknown node type."); |
| 730 | PyErr_SetObject(parser_error, err); |
| 731 | Py_XDECREF(err); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 732 | Py_XDECREF(elem); |
| 733 | return (0); |
| 734 | } |
Martin v. Löwis | 49c5da1 | 2006-03-01 22:49:05 +0000 | [diff] [blame] | 735 | err = PyNode_AddChild(root, type, strn, *line_num, 0); |
Fred Drake | 8b55b2d | 2001-12-05 22:10:44 +0000 | [diff] [blame] | 736 | if (err == E_NOMEM) { |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 737 | PyObject_FREE(strn); |
Fred Drake | 8b55b2d | 2001-12-05 22:10:44 +0000 | [diff] [blame] | 738 | return (node *) PyErr_NoMemory(); |
| 739 | } |
| 740 | if (err == E_OVERFLOW) { |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 741 | PyObject_FREE(strn); |
Fred Drake | 8b55b2d | 2001-12-05 22:10:44 +0000 | [diff] [blame] | 742 | PyErr_SetString(PyExc_ValueError, |
| 743 | "unsupported number of child nodes"); |
| 744 | return NULL; |
| 745 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 746 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 747 | if (ISNONTERMINAL(type)) { |
| 748 | node* new_child = CHILD(root, i - 1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 749 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 750 | if (new_child != build_node_children(elem, new_child, line_num)) { |
| 751 | Py_XDECREF(elem); |
| 752 | return (0); |
| 753 | } |
| 754 | } |
| 755 | else if (type == NEWLINE) { /* It's true: we increment the */ |
| 756 | ++(*line_num); /* line number *after* the newline! */ |
| 757 | } |
| 758 | Py_XDECREF(elem); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 759 | } |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 760 | return root; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 761 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 762 | |
| 763 | |
| 764 | static node* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 765 | build_node_tree(PyObject *tuple) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 766 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 767 | node* res = 0; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 768 | PyObject *temp = PySequence_GetItem(tuple, 0); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 769 | long num = -1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 770 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 771 | if (temp != NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 772 | num = PyInt_AsLong(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 773 | Py_XDECREF(temp); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 774 | if (ISTERMINAL(num)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 775 | /* |
| 776 | * The tuple is simple, but it doesn't start with a start symbol. |
| 777 | * Throw an exception now and be done with it. |
| 778 | */ |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 779 | tuple = Py_BuildValue("os", tuple, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 780 | "Illegal syntax-tree; cannot start with terminal symbol."); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 781 | PyErr_SetObject(parser_error, tuple); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 782 | Py_XDECREF(tuple); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 783 | } |
| 784 | else if (ISNONTERMINAL(num)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 785 | /* |
| 786 | * Not efficient, but that can be handled later. |
| 787 | */ |
| 788 | int line_num = 0; |
Michael W. Hudson | df1252d | 2003-02-08 18:05:10 +0000 | [diff] [blame] | 789 | PyObject *encoding = NULL; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 790 | |
Michael W. Hudson | df1252d | 2003-02-08 18:05:10 +0000 | [diff] [blame] | 791 | if (num == encoding_decl) { |
| 792 | encoding = PySequence_GetItem(tuple, 2); |
| 793 | /* tuple isn't borrowed anymore here, need to DECREF */ |
| 794 | tuple = PySequence_GetSlice(tuple, 0, 2); |
| 795 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 796 | res = PyNode_New(num); |
Fred Drake | 8b55b2d | 2001-12-05 22:10:44 +0000 | [diff] [blame] | 797 | if (res != NULL) { |
| 798 | if (res != build_node_children(tuple, res, &line_num)) { |
| 799 | PyNode_Free(res); |
| 800 | res = NULL; |
| 801 | } |
Michael W. Hudson | df1252d | 2003-02-08 18:05:10 +0000 | [diff] [blame] | 802 | if (res && encoding) { |
Martin v. Löwis | ad0a462 | 2006-02-16 14:30:23 +0000 | [diff] [blame] | 803 | Py_ssize_t len; |
Michael W. Hudson | df1252d | 2003-02-08 18:05:10 +0000 | [diff] [blame] | 804 | len = PyString_GET_SIZE(encoding) + 1; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 805 | res->n_str = (char *)PyObject_MALLOC(len); |
Michael W. Hudson | df1252d | 2003-02-08 18:05:10 +0000 | [diff] [blame] | 806 | if (res->n_str != NULL) |
| 807 | (void) memcpy(res->n_str, PyString_AS_STRING(encoding), len); |
| 808 | Py_DECREF(encoding); |
| 809 | Py_DECREF(tuple); |
| 810 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 811 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 812 | } |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 813 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 814 | /* The tuple is illegal -- if the number is neither TERMINAL nor |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 815 | * NONTERMINAL, we can't use it. Not sure the implementation |
| 816 | * allows this condition, but the API doesn't preclude it. |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 817 | */ |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 818 | PyObject *err = Py_BuildValue("os", tuple, |
| 819 | "Illegal component tuple."); |
| 820 | PyErr_SetObject(parser_error, err); |
| 821 | Py_XDECREF(err); |
| 822 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 823 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 824 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 825 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 826 | |
| 827 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 828 | /* |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 829 | * Validation routines used within the validation section: |
| 830 | */ |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 831 | static int validate_terminal(node *terminal, int type, char *string); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 832 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 833 | #define validate_ampersand(ch) validate_terminal(ch, AMPER, "&") |
| 834 | #define validate_circumflex(ch) validate_terminal(ch, CIRCUMFLEX, "^") |
| 835 | #define validate_colon(ch) validate_terminal(ch, COLON, ":") |
| 836 | #define validate_comma(ch) validate_terminal(ch, COMMA, ",") |
| 837 | #define validate_dedent(ch) validate_terminal(ch, DEDENT, "") |
| 838 | #define validate_equal(ch) validate_terminal(ch, EQUAL, "=") |
| 839 | #define validate_indent(ch) validate_terminal(ch, INDENT, (char*)NULL) |
| 840 | #define validate_lparen(ch) validate_terminal(ch, LPAR, "(") |
| 841 | #define validate_newline(ch) validate_terminal(ch, NEWLINE, (char*)NULL) |
| 842 | #define validate_rparen(ch) validate_terminal(ch, RPAR, ")") |
| 843 | #define validate_semi(ch) validate_terminal(ch, SEMI, ";") |
| 844 | #define validate_star(ch) validate_terminal(ch, STAR, "*") |
| 845 | #define validate_vbar(ch) validate_terminal(ch, VBAR, "|") |
| 846 | #define validate_doublestar(ch) validate_terminal(ch, DOUBLESTAR, "**") |
| 847 | #define validate_dot(ch) validate_terminal(ch, DOT, ".") |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 848 | #define validate_at(ch) validate_terminal(ch, AT, "@") |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 849 | #define validate_name(ch, str) validate_terminal(ch, NAME, str) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 850 | |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 851 | #define VALIDATER(n) static int validate_##n(node *tree) |
| 852 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 853 | VALIDATER(node); VALIDATER(small_stmt); |
| 854 | VALIDATER(class); VALIDATER(node); |
| 855 | VALIDATER(parameters); VALIDATER(suite); |
| 856 | VALIDATER(testlist); VALIDATER(varargslist); |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 857 | VALIDATER(vfpdef); VALIDATER(vfplist); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 858 | VALIDATER(stmt); VALIDATER(simple_stmt); |
| 859 | VALIDATER(expr_stmt); VALIDATER(power); |
Guido van Rossum | 452bf51 | 2007-02-09 05:32:43 +0000 | [diff] [blame] | 860 | VALIDATER(del_stmt); |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 861 | VALIDATER(return_stmt); VALIDATER(raise_stmt); |
| 862 | VALIDATER(import_stmt); VALIDATER(import_stmt); |
| 863 | VALIDATER(import_name); VALIDATER(yield_stmt); |
| 864 | VALIDATER(global_stmt); VALIDATER(assert_stmt); |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 865 | VALIDATER(compound_stmt); VALIDATER(vname); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 866 | VALIDATER(while); VALIDATER(for); |
| 867 | VALIDATER(try); VALIDATER(except_clause); |
| 868 | VALIDATER(test); VALIDATER(and_test); |
| 869 | VALIDATER(not_test); VALIDATER(comparison); |
| 870 | VALIDATER(comp_op); VALIDATER(expr); |
| 871 | VALIDATER(xor_expr); VALIDATER(and_expr); |
| 872 | VALIDATER(shift_expr); VALIDATER(arith_expr); |
| 873 | VALIDATER(term); VALIDATER(factor); |
| 874 | VALIDATER(atom); VALIDATER(lambdef); |
| 875 | VALIDATER(trailer); VALIDATER(subscript); |
| 876 | VALIDATER(subscriptlist); VALIDATER(sliceop); |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 877 | VALIDATER(exprlist); VALIDATER(dictorsetmaker); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 878 | VALIDATER(arglist); VALIDATER(argument); |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 879 | VALIDATER(testlist1); VALIDATER(comp_for); |
| 880 | VALIDATER(comp_iter); VALIDATER(comp_if); |
| 881 | VALIDATER(testlist_comp); VALIDATER(yield_expr); |
| 882 | VALIDATER(yield_or_testlist); VALIDATER(or_test); |
| 883 | VALIDATER(test_nocond); VALIDATER(lambdef_nocond); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 884 | |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 885 | #undef VALIDATER |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 886 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 887 | #define is_even(n) (((n) & 1) == 0) |
| 888 | #define is_odd(n) (((n) & 1) == 1) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 889 | |
| 890 | |
| 891 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 892 | validate_ntype(node *n, int t) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 893 | { |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 894 | if (TYPE(n) != t) { |
| 895 | PyErr_Format(parser_error, "Expected node type %d, got %d.", |
| 896 | t, TYPE(n)); |
| 897 | return 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 898 | } |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 899 | return 1; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 900 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 901 | |
| 902 | |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 903 | /* Verifies that the number of child nodes is exactly 'num', raising |
| 904 | * an exception if it isn't. The exception message does not indicate |
| 905 | * the exact number of nodes, allowing this to be used to raise the |
| 906 | * "right" exception when the wrong number of nodes is present in a |
| 907 | * specific variant of a statement's syntax. This is commonly used |
| 908 | * in that fashion. |
| 909 | */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 910 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 911 | validate_numnodes(node *n, int num, const char *const name) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 912 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 913 | if (NCH(n) != num) { |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 914 | PyErr_Format(parser_error, |
| 915 | "Illegal number of children for %s node.", name); |
| 916 | return 0; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 917 | } |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 918 | return 1; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 919 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 920 | |
| 921 | |
| 922 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 923 | validate_terminal(node *terminal, int type, char *string) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 924 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 925 | int res = (validate_ntype(terminal, type) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 926 | && ((string == 0) || (strcmp(string, STR(terminal)) == 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 927 | |
| 928 | if (!res && !PyErr_Occurred()) { |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 929 | PyErr_Format(parser_error, |
| 930 | "Illegal terminal: expected \"%s\"", string); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 931 | } |
| 932 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 933 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 934 | |
| 935 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 936 | /* X (',' X) [','] |
| 937 | */ |
| 938 | static int |
Thomas Wouters | bd4bc4e | 2000-07-22 23:57:55 +0000 | [diff] [blame] | 939 | validate_repeating_list(node *tree, int ntype, int (*vfunc)(node *), |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 940 | const char *const name) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 941 | { |
| 942 | int nch = NCH(tree); |
| 943 | int res = (nch && validate_ntype(tree, ntype) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 944 | && vfunc(CHILD(tree, 0))); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 945 | |
| 946 | if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 947 | (void) validate_numnodes(tree, 1, name); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 948 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 949 | if (is_even(nch)) |
| 950 | res = validate_comma(CHILD(tree, --nch)); |
| 951 | if (res && nch > 1) { |
| 952 | int pos = 1; |
| 953 | for ( ; res && pos < nch; pos += 2) |
| 954 | res = (validate_comma(CHILD(tree, pos)) |
| 955 | && vfunc(CHILD(tree, pos + 1))); |
| 956 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 957 | } |
| 958 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 959 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 960 | |
| 961 | |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 962 | /* validate_class() |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 963 | * |
| 964 | * classdef: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 965 | * 'class' NAME ['(' testlist ')'] ':' suite |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 966 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 967 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 968 | validate_class(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 969 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 970 | int nch = NCH(tree); |
Brett Cannon | f418991 | 2005-04-09 02:30:16 +0000 | [diff] [blame] | 971 | int res = (validate_ntype(tree, classdef) && |
| 972 | ((nch == 4) || (nch == 6) || (nch == 7))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 973 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 974 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 975 | res = (validate_name(CHILD(tree, 0), "class") |
| 976 | && validate_ntype(CHILD(tree, 1), NAME) |
| 977 | && validate_colon(CHILD(tree, nch - 2)) |
| 978 | && validate_suite(CHILD(tree, nch - 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 979 | } |
Brett Cannon | f418991 | 2005-04-09 02:30:16 +0000 | [diff] [blame] | 980 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 981 | (void) validate_numnodes(tree, 4, "class"); |
Brett Cannon | f418991 | 2005-04-09 02:30:16 +0000 | [diff] [blame] | 982 | } |
| 983 | |
| 984 | if (res) { |
| 985 | if (nch == 7) { |
| 986 | res = ((validate_lparen(CHILD(tree, 2)) && |
| 987 | validate_testlist(CHILD(tree, 3)) && |
| 988 | validate_rparen(CHILD(tree, 4)))); |
| 989 | } |
| 990 | else if (nch == 6) { |
| 991 | res = (validate_lparen(CHILD(tree,2)) && |
| 992 | validate_rparen(CHILD(tree,3))); |
| 993 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 994 | } |
| 995 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 996 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 997 | |
| 998 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 999 | /* if_stmt: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1000 | * 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1001 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1002 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1003 | validate_if(node *tree) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1004 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1005 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1006 | int res = (validate_ntype(tree, if_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1007 | && (nch >= 4) |
| 1008 | && validate_name(CHILD(tree, 0), "if") |
| 1009 | && validate_test(CHILD(tree, 1)) |
| 1010 | && validate_colon(CHILD(tree, 2)) |
| 1011 | && validate_suite(CHILD(tree, 3))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1012 | |
| 1013 | if (res && ((nch % 4) == 3)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1014 | /* ... 'else' ':' suite */ |
| 1015 | res = (validate_name(CHILD(tree, nch - 3), "else") |
| 1016 | && validate_colon(CHILD(tree, nch - 2)) |
| 1017 | && validate_suite(CHILD(tree, nch - 1))); |
| 1018 | nch -= 3; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1019 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1020 | else if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1021 | (void) validate_numnodes(tree, 4, "if"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1022 | if ((nch % 4) != 0) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1023 | /* Will catch the case for nch < 4 */ |
| 1024 | res = validate_numnodes(tree, 0, "if"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1025 | else if (res && (nch > 4)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1026 | /* ... ('elif' test ':' suite)+ ... */ |
| 1027 | int j = 4; |
| 1028 | while ((j < nch) && res) { |
| 1029 | res = (validate_name(CHILD(tree, j), "elif") |
| 1030 | && validate_colon(CHILD(tree, j + 2)) |
| 1031 | && validate_test(CHILD(tree, j + 1)) |
| 1032 | && validate_suite(CHILD(tree, j + 3))); |
| 1033 | j += 4; |
| 1034 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1035 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1036 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1037 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1038 | |
| 1039 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1040 | /* parameters: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1041 | * '(' [varargslist] ')' |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1042 | * |
| 1043 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1044 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1045 | validate_parameters(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1046 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1047 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1048 | int res = validate_ntype(tree, parameters) && ((nch == 2) || (nch == 3)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1049 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1050 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1051 | res = (validate_lparen(CHILD(tree, 0)) |
| 1052 | && validate_rparen(CHILD(tree, nch - 1))); |
| 1053 | if (res && (nch == 3)) |
| 1054 | res = validate_varargslist(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1055 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1056 | else { |
| 1057 | (void) validate_numnodes(tree, 2, "parameters"); |
| 1058 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1059 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1060 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1061 | |
| 1062 | |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1063 | /* validate_suite() |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1064 | * |
| 1065 | * suite: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1066 | * simple_stmt |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1067 | * | NEWLINE INDENT stmt+ DEDENT |
| 1068 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1069 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1070 | validate_suite(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1071 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1072 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1073 | int res = (validate_ntype(tree, suite) && ((nch == 1) || (nch >= 4))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1074 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1075 | if (res && (nch == 1)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1076 | res = validate_simple_stmt(CHILD(tree, 0)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1077 | else if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1078 | /* NEWLINE INDENT stmt+ DEDENT */ |
| 1079 | res = (validate_newline(CHILD(tree, 0)) |
| 1080 | && validate_indent(CHILD(tree, 1)) |
| 1081 | && validate_stmt(CHILD(tree, 2)) |
| 1082 | && validate_dedent(CHILD(tree, nch - 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1083 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1084 | if (res && (nch > 4)) { |
| 1085 | int i = 3; |
| 1086 | --nch; /* forget the DEDENT */ |
| 1087 | for ( ; res && (i < nch); ++i) |
| 1088 | res = validate_stmt(CHILD(tree, i)); |
| 1089 | } |
| 1090 | else if (nch < 4) |
| 1091 | res = validate_numnodes(tree, 4, "suite"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1092 | } |
| 1093 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1094 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1095 | |
| 1096 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1097 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1098 | validate_testlist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1099 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1100 | return (validate_repeating_list(tree, testlist, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1101 | validate_test, "testlist")); |
| 1102 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1103 | |
| 1104 | |
Guido van Rossum | 1c91707 | 2001-10-15 15:44:05 +0000 | [diff] [blame] | 1105 | static int |
Guido van Rossum | 2d3b986 | 2002-05-24 15:47:06 +0000 | [diff] [blame] | 1106 | validate_testlist1(node *tree) |
| 1107 | { |
| 1108 | return (validate_repeating_list(tree, testlist1, |
| 1109 | validate_test, "testlist1")); |
| 1110 | } |
| 1111 | |
| 1112 | |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1113 | /* validate either vname or tname. |
| 1114 | * vname: NAME |
| 1115 | * tname: NAME [':' test] |
| 1116 | */ |
| 1117 | static int |
| 1118 | validate_vname(node *tree) |
| 1119 | { |
| 1120 | int nch = NCH(tree); |
| 1121 | if (TYPE(tree) == vname) { |
| 1122 | return nch == 1 && validate_name(CHILD(tree, 0), NULL); |
| 1123 | } |
| 1124 | else if (TYPE(tree) == tname) { |
| 1125 | if (nch == 1) { |
| 1126 | return validate_name(CHILD(tree, 0), NULL); |
| 1127 | } |
| 1128 | else if (nch == 3) { |
| 1129 | return validate_name(CHILD(tree, 0), NULL) && |
| 1130 | validate_colon(CHILD(tree, 1)) && |
| 1131 | validate_test(CHILD(tree, 2)); |
| 1132 | } |
| 1133 | } |
| 1134 | return 0; |
| 1135 | } |
| 1136 | |
| 1137 | /* '*' vname (',' vname ['=' test])* [',' '**' vname] | '**' vname |
| 1138 | * ..or tname in place of vname. vname: NAME; tname: NAME [':' test] |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1139 | */ |
| 1140 | static int |
| 1141 | validate_varargslist_trailer(node *tree, int start) |
| 1142 | { |
| 1143 | int nch = NCH(tree); |
Guido van Rossum | 4f72a78 | 2006-10-27 23:31:49 +0000 | [diff] [blame] | 1144 | int res = 0, i; |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1145 | int sym; |
| 1146 | |
| 1147 | if (nch <= start) { |
| 1148 | err_string("expected variable argument trailer for varargslist"); |
| 1149 | return 0; |
| 1150 | } |
| 1151 | sym = TYPE(CHILD(tree, start)); |
| 1152 | if (sym == STAR) { |
| 1153 | /* |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1154 | * '*' vname (',' vname ['=' test])* [',' '**' vname] | '**' vname |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1155 | */ |
| 1156 | if (nch-start == 2) |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1157 | res = validate_vname(CHILD(tree, start+1)); |
Guido van Rossum | 4f72a78 | 2006-10-27 23:31:49 +0000 | [diff] [blame] | 1158 | else if (nch-start == 5 && TYPE(CHILD(tree, start+2)) == COMMA) |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1159 | res = (validate_vname(CHILD(tree, start+1)) |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1160 | && validate_comma(CHILD(tree, start+2)) |
| 1161 | && validate_doublestar(CHILD(tree, start+3)) |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1162 | && validate_vname(CHILD(tree, start+4))); |
Guido van Rossum | 4f72a78 | 2006-10-27 23:31:49 +0000 | [diff] [blame] | 1163 | else { |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1164 | /* skip over vname (',' vname ['=' test])* */ |
Guido van Rossum | 4f72a78 | 2006-10-27 23:31:49 +0000 | [diff] [blame] | 1165 | i = start + 1; |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1166 | if (TYPE(CHILD(tree, i)) == vname || |
| 1167 | TYPE(CHILD(tree, i)) == tname) { /* skip over vname or tname */ |
Guido van Rossum | 4f72a78 | 2006-10-27 23:31:49 +0000 | [diff] [blame] | 1168 | i += 1; |
| 1169 | } |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1170 | while (res && i+1 < nch) { /* validate (',' vname ['=' test])* */ |
Guido van Rossum | 4f72a78 | 2006-10-27 23:31:49 +0000 | [diff] [blame] | 1171 | res = validate_comma(CHILD(tree, i)); |
| 1172 | if (TYPE(CHILD(tree, i+1)) == DOUBLESTAR) |
| 1173 | break; |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1174 | res = res && validate_vname(CHILD(tree, i+1)); |
Guido van Rossum | 4f72a78 | 2006-10-27 23:31:49 +0000 | [diff] [blame] | 1175 | if (res && i+2 < nch && TYPE(CHILD(tree, i+2)) == EQUAL) { |
| 1176 | res = res && (i+3 < nch) |
| 1177 | && validate_test(CHILD(tree, i+3)); |
| 1178 | i += 4; |
| 1179 | } |
| 1180 | else { |
| 1181 | i += 2; |
| 1182 | } |
| 1183 | } |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1184 | /* [',' '**' vname] */ |
Guido van Rossum | 4f72a78 | 2006-10-27 23:31:49 +0000 | [diff] [blame] | 1185 | if (res && i+1 < nch && TYPE(CHILD(tree, i+1)) == DOUBLESTAR) { |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1186 | res = validate_vname(CHILD(tree, i+2)); |
Guido van Rossum | 4f72a78 | 2006-10-27 23:31:49 +0000 | [diff] [blame] | 1187 | } |
| 1188 | } |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1189 | } |
| 1190 | else if (sym == DOUBLESTAR) { |
| 1191 | /* |
| 1192 | * '**' NAME |
| 1193 | */ |
| 1194 | if (nch-start == 2) |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1195 | res = validate_vname(CHILD(tree, start+1)); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1196 | } |
| 1197 | if (!res) |
| 1198 | err_string("illegal variable argument trailer for varargslist"); |
| 1199 | return res; |
| 1200 | } |
| 1201 | |
| 1202 | |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1203 | /* validate_varargslist() |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1204 | * |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1205 | * Validate typedargslist or varargslist. |
| 1206 | * |
| 1207 | * typedargslist: ((tfpdef ['=' test] ',')* |
| 1208 | * ('*' [tname] (',' tname ['=' test])* [',' '**' tname] | |
| 1209 | * '**' tname) |
| 1210 | * | tfpdef ['=' test] (',' tfpdef ['=' test])* [',']) |
| 1211 | * tname: NAME [':' test] |
| 1212 | * tfpdef: tname | '(' tfplist ')' |
| 1213 | * tfplist: tfpdef (',' tfpdef)* [','] |
| 1214 | * varargslist: ((vfpdef ['=' test] ',')* |
| 1215 | * ('*' [vname] (',' vname ['=' test])* [',' '**' vname] | |
| 1216 | * '**' vname) |
| 1217 | * | vfpdef ['=' test] (',' vfpdef ['=' test])* [',']) |
| 1218 | * vname: NAME |
| 1219 | * vfpdef: vname | '(' vfplist ')' |
| 1220 | * vfplist: vfpdef (',' vfpdef)* [','] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1221 | * |
| 1222 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1223 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1224 | validate_varargslist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1225 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1226 | int nch = NCH(tree); |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1227 | int res = (TYPE(tree) == varargslist || |
| 1228 | TYPE(tree) == typedargslist) && |
| 1229 | (nch != 0); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1230 | int sym; |
Fred Drake | b6429a2 | 2000-12-11 22:08:27 +0000 | [diff] [blame] | 1231 | if (!res) |
| 1232 | return 0; |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1233 | if (nch < 1) { |
| 1234 | err_string("varargslist missing child nodes"); |
| 1235 | return 0; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1236 | } |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1237 | sym = TYPE(CHILD(tree, 0)); |
| 1238 | if (sym == STAR || sym == DOUBLESTAR) |
Fred Drake | b6429a2 | 2000-12-11 22:08:27 +0000 | [diff] [blame] | 1239 | /* whole thing matches: |
Guido van Rossum | 4f72a78 | 2006-10-27 23:31:49 +0000 | [diff] [blame] | 1240 | * '*' [NAME] (',' NAME ['=' test])* [',' '**' NAME] | '**' NAME |
Fred Drake | b6429a2 | 2000-12-11 22:08:27 +0000 | [diff] [blame] | 1241 | */ |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1242 | res = validate_varargslist_trailer(tree, 0); |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1243 | else if (sym == vfpdef || sym == tfpdef) { |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1244 | int i = 0; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1245 | |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1246 | sym = TYPE(CHILD(tree, nch-1)); |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1247 | if (sym == vname || sym == tname) { |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1248 | /* |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1249 | * (vfpdef ['=' test] ',')+ |
| 1250 | * ('*' vname [',' '**' vname] |
| 1251 | * | '**' vname) |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1252 | */ |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1253 | /* skip over (vfpdef ['=' test] ',')+ */ |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1254 | while (res && (i+2 <= nch)) { |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1255 | res = validate_vfpdef(CHILD(tree, i)); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1256 | ++i; |
| 1257 | if (res && TYPE(CHILD(tree, i)) == EQUAL && (i+2 <= nch)) { |
| 1258 | res = (validate_equal(CHILD(tree, i)) |
| 1259 | && validate_test(CHILD(tree, i+1))); |
| 1260 | if (res) |
| 1261 | i += 2; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1262 | } |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1263 | if (res && i < nch) { |
| 1264 | res = validate_comma(CHILD(tree, i)); |
Fred Drake | b6429a2 | 2000-12-11 22:08:27 +0000 | [diff] [blame] | 1265 | ++i; |
| 1266 | if (res && i < nch |
| 1267 | && (TYPE(CHILD(tree, i)) == DOUBLESTAR |
| 1268 | || TYPE(CHILD(tree, i)) == STAR)) |
| 1269 | break; |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1270 | } |
| 1271 | } |
Guido van Rossum | 4f72a78 | 2006-10-27 23:31:49 +0000 | [diff] [blame] | 1272 | /* .. ('*' [NAME] (',' NAME ['=' test])* [',' '**' NAME] | '**' NAME) |
Fred Drake | b6429a2 | 2000-12-11 22:08:27 +0000 | [diff] [blame] | 1273 | * i --^^^ |
| 1274 | */ |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1275 | if (res) |
| 1276 | res = validate_varargslist_trailer(tree, i); |
| 1277 | } |
| 1278 | else { |
| 1279 | /* |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1280 | * vfpdef ['=' test] (',' vfpdef ['=' test])* [','] |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1281 | */ |
Fred Drake | b6429a2 | 2000-12-11 22:08:27 +0000 | [diff] [blame] | 1282 | /* strip trailing comma node */ |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1283 | if (sym == COMMA) { |
| 1284 | res = validate_comma(CHILD(tree, nch-1)); |
| 1285 | if (!res) |
| 1286 | return 0; |
| 1287 | --nch; |
| 1288 | } |
| 1289 | /* |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1290 | * vfpdef ['=' test] (',' vfpdef ['=' test])* |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1291 | */ |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1292 | res = validate_vfpdef(CHILD(tree, 0)); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1293 | ++i; |
Fred Drake | b6429a2 | 2000-12-11 22:08:27 +0000 | [diff] [blame] | 1294 | if (res && (i+2 <= nch) && TYPE(CHILD(tree, i)) == EQUAL) { |
| 1295 | res = (validate_equal(CHILD(tree, i)) |
| 1296 | && validate_test(CHILD(tree, i+1))); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1297 | i += 2; |
| 1298 | } |
| 1299 | /* |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1300 | * ... (',' vfpdef ['=' test])* |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1301 | * i ---^^^ |
| 1302 | */ |
| 1303 | while (res && (nch - i) >= 2) { |
| 1304 | res = (validate_comma(CHILD(tree, i)) |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1305 | && validate_vfpdef(CHILD(tree, i+1))); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1306 | i += 2; |
Fred Drake | b6429a2 | 2000-12-11 22:08:27 +0000 | [diff] [blame] | 1307 | if (res && (nch - i) >= 2 && TYPE(CHILD(tree, i)) == EQUAL) { |
| 1308 | res = (validate_equal(CHILD(tree, i)) |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1309 | && validate_test(CHILD(tree, i+1))); |
Fred Drake | b6429a2 | 2000-12-11 22:08:27 +0000 | [diff] [blame] | 1310 | i += 2; |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1311 | } |
| 1312 | } |
| 1313 | if (res && nch - i != 0) { |
| 1314 | res = 0; |
| 1315 | err_string("illegal formation for varargslist"); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1316 | } |
| 1317 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1318 | } |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1319 | return res; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1320 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1321 | |
| 1322 | |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1323 | /* comp_iter: comp_for | comp_if |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1324 | */ |
| 1325 | static int |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1326 | validate_comp_iter(node *tree) |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1327 | { |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1328 | int res = (validate_ntype(tree, comp_iter) |
| 1329 | && validate_numnodes(tree, 1, "comp_iter")); |
| 1330 | if (res && TYPE(CHILD(tree, 0)) == comp_for) |
| 1331 | res = validate_comp_for(CHILD(tree, 0)); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1332 | else |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1333 | res = validate_comp_if(CHILD(tree, 0)); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1334 | |
| 1335 | return res; |
| 1336 | } |
| 1337 | |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1338 | /* comp_for: 'for' exprlist 'in' test [comp_iter] |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1339 | */ |
| 1340 | static int |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1341 | validate_comp_for(node *tree) |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1342 | { |
| 1343 | int nch = NCH(tree); |
| 1344 | int res; |
| 1345 | |
| 1346 | if (nch == 5) |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1347 | res = validate_comp_iter(CHILD(tree, 4)); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1348 | else |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1349 | res = validate_numnodes(tree, 4, "comp_for"); |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1350 | |
| 1351 | if (res) |
| 1352 | res = (validate_name(CHILD(tree, 0), "for") |
| 1353 | && validate_exprlist(CHILD(tree, 1)) |
| 1354 | && validate_name(CHILD(tree, 2), "in") |
Thomas Wouters | e2dd78c | 2006-02-27 16:25:11 +0000 | [diff] [blame] | 1355 | && validate_or_test(CHILD(tree, 3))); |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 1356 | |
| 1357 | return res; |
| 1358 | } |
| 1359 | |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1360 | /* comp_if: 'if' test_nocond [comp_iter] |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1361 | */ |
| 1362 | static int |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1363 | validate_comp_if(node *tree) |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1364 | { |
| 1365 | int nch = NCH(tree); |
| 1366 | int res; |
| 1367 | |
| 1368 | if (nch == 3) |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1369 | res = validate_comp_iter(CHILD(tree, 2)); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1370 | else |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1371 | res = validate_numnodes(tree, 2, "comp_if"); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1372 | |
| 1373 | if (res) |
| 1374 | res = (validate_name(CHILD(tree, 0), "if") |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 1375 | && validate_test_nocond(CHILD(tree, 1))); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1376 | |
| 1377 | return res; |
| 1378 | } |
| 1379 | |
| 1380 | |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1381 | /* validate_vfpdef() |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1382 | * |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1383 | * Validate vfpdef or tfpdef. |
| 1384 | * |
| 1385 | * vname: NAME |
| 1386 | * vfpdef: vname | '(' vfplist ')' |
| 1387 | * vfplist: vfpdef (',' vfpdef)* [','] |
| 1388 | * |
| 1389 | * tname: NAME [':' test] |
| 1390 | * tfpdef: tname | '(' tfplist ')' |
| 1391 | * tfplist: tfpdef (',' tfpdef)* [','] |
| 1392 | * |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1393 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1394 | static int |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1395 | validate_vfpdef(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1396 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1397 | int nch = NCH(tree); |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1398 | int typ = TYPE(tree); |
| 1399 | int res = typ == vfpdef || typ == tfpdef; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1400 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1401 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1402 | if (nch == 1) |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1403 | res = validate_vname(CHILD(tree, 0)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1404 | else if (nch == 3) |
| 1405 | res = (validate_lparen(CHILD(tree, 0)) |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1406 | && validate_vfplist(CHILD(tree, 1)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1407 | && validate_rparen(CHILD(tree, 2))); |
| 1408 | else |
| 1409 | res = validate_numnodes(tree, 1, "fpdef"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1410 | } |
| 1411 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1412 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1413 | |
| 1414 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1415 | static int |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1416 | validate_vfplist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1417 | { |
Neal Norwitz | c150536 | 2006-12-28 06:47:50 +0000 | [diff] [blame] | 1418 | return (validate_repeating_list(tree, vfplist, |
| 1419 | validate_vfpdef, "vfplist")); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1420 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1421 | |
| 1422 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1423 | /* simple_stmt | compound_stmt |
| 1424 | * |
| 1425 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1426 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1427 | validate_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1428 | { |
| 1429 | int res = (validate_ntype(tree, stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1430 | && validate_numnodes(tree, 1, "stmt")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1431 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1432 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1433 | tree = CHILD(tree, 0); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1434 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1435 | if (TYPE(tree) == simple_stmt) |
| 1436 | res = validate_simple_stmt(tree); |
| 1437 | else |
| 1438 | res = validate_compound_stmt(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1439 | } |
| 1440 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1441 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1442 | |
| 1443 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1444 | /* small_stmt (';' small_stmt)* [';'] NEWLINE |
| 1445 | * |
| 1446 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1447 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1448 | validate_simple_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1449 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1450 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1451 | int res = (validate_ntype(tree, simple_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1452 | && (nch >= 2) |
| 1453 | && validate_small_stmt(CHILD(tree, 0)) |
| 1454 | && validate_newline(CHILD(tree, nch - 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1455 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1456 | if (nch < 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1457 | res = validate_numnodes(tree, 2, "simple_stmt"); |
| 1458 | --nch; /* forget the NEWLINE */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1459 | if (res && is_even(nch)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1460 | res = validate_semi(CHILD(tree, --nch)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1461 | if (res && (nch > 2)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1462 | int i; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1463 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1464 | for (i = 1; res && (i < nch); i += 2) |
| 1465 | res = (validate_semi(CHILD(tree, i)) |
| 1466 | && validate_small_stmt(CHILD(tree, i + 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1467 | } |
| 1468 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1469 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1470 | |
| 1471 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1472 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1473 | validate_small_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1474 | { |
| 1475 | int nch = NCH(tree); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 1476 | int res = validate_numnodes(tree, 1, "small_stmt"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1477 | |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 1478 | if (res) { |
| 1479 | int ntype = TYPE(CHILD(tree, 0)); |
| 1480 | |
| 1481 | if ( (ntype == expr_stmt) |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 1482 | || (ntype == del_stmt) |
| 1483 | || (ntype == pass_stmt) |
| 1484 | || (ntype == flow_stmt) |
| 1485 | || (ntype == import_stmt) |
| 1486 | || (ntype == global_stmt) |
Georg Brandl | 7cae87c | 2006-09-06 06:51:57 +0000 | [diff] [blame] | 1487 | || (ntype == assert_stmt)) |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 1488 | res = validate_node(CHILD(tree, 0)); |
| 1489 | else { |
| 1490 | res = 0; |
| 1491 | err_string("illegal small_stmt child type"); |
| 1492 | } |
| 1493 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1494 | else if (nch == 1) { |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 1495 | res = 0; |
| 1496 | PyErr_Format(parser_error, |
| 1497 | "Unrecognized child node of small_stmt: %d.", |
| 1498 | TYPE(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1499 | } |
| 1500 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1501 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1502 | |
| 1503 | |
| 1504 | /* compound_stmt: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1505 | * if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1506 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1507 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1508 | validate_compound_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1509 | { |
| 1510 | int res = (validate_ntype(tree, compound_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1511 | && validate_numnodes(tree, 1, "compound_stmt")); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 1512 | int ntype; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1513 | |
| 1514 | if (!res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1515 | return (0); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1516 | |
| 1517 | tree = CHILD(tree, 0); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 1518 | ntype = TYPE(tree); |
| 1519 | if ( (ntype == if_stmt) |
| 1520 | || (ntype == while_stmt) |
| 1521 | || (ntype == for_stmt) |
| 1522 | || (ntype == try_stmt) |
| 1523 | || (ntype == funcdef) |
| 1524 | || (ntype == classdef)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1525 | res = validate_node(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1526 | else { |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 1527 | res = 0; |
| 1528 | PyErr_Format(parser_error, |
| 1529 | "Illegal compound statement type: %d.", TYPE(tree)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1530 | } |
| 1531 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1532 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1533 | |
| 1534 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1535 | static int |
Phillip J. Eby | 0d6615f | 2005-08-02 00:46:46 +0000 | [diff] [blame] | 1536 | validate_yield_or_testlist(node *tree) |
| 1537 | { |
| 1538 | if (TYPE(tree) == yield_expr) |
| 1539 | return validate_yield_expr(tree); |
| 1540 | else |
| 1541 | return validate_testlist(tree); |
| 1542 | } |
| 1543 | |
| 1544 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1545 | validate_expr_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1546 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1547 | int j; |
| 1548 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1549 | int res = (validate_ntype(tree, expr_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1550 | && is_odd(nch) |
| 1551 | && validate_testlist(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1552 | |
Fred Drake | 28f739a | 2000-08-25 22:42:40 +0000 | [diff] [blame] | 1553 | if (res && nch == 3 |
| 1554 | && TYPE(CHILD(tree, 1)) == augassign) { |
Phillip J. Eby | 0d6615f | 2005-08-02 00:46:46 +0000 | [diff] [blame] | 1555 | res = validate_numnodes(CHILD(tree, 1), 1, "augassign") |
| 1556 | && validate_yield_or_testlist(CHILD(tree, 2)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1557 | |
Fred Drake | 28f739a | 2000-08-25 22:42:40 +0000 | [diff] [blame] | 1558 | if (res) { |
| 1559 | char *s = STR(CHILD(CHILD(tree, 1), 0)); |
| 1560 | |
| 1561 | res = (strcmp(s, "+=") == 0 |
| 1562 | || strcmp(s, "-=") == 0 |
| 1563 | || strcmp(s, "*=") == 0 |
| 1564 | || strcmp(s, "/=") == 0 |
Michael W. Hudson | 5e83b7a | 2003-01-29 14:20:23 +0000 | [diff] [blame] | 1565 | || strcmp(s, "//=") == 0 |
Fred Drake | 28f739a | 2000-08-25 22:42:40 +0000 | [diff] [blame] | 1566 | || strcmp(s, "%=") == 0 |
| 1567 | || strcmp(s, "&=") == 0 |
| 1568 | || strcmp(s, "|=") == 0 |
| 1569 | || strcmp(s, "^=") == 0 |
| 1570 | || strcmp(s, "<<=") == 0 |
| 1571 | || strcmp(s, ">>=") == 0 |
| 1572 | || strcmp(s, "**=") == 0); |
| 1573 | if (!res) |
| 1574 | err_string("illegal augmmented assignment operator"); |
| 1575 | } |
| 1576 | } |
| 1577 | else { |
| 1578 | for (j = 1; res && (j < nch); j += 2) |
Phillip J. Eby | 0d6615f | 2005-08-02 00:46:46 +0000 | [diff] [blame] | 1579 | res = validate_equal(CHILD(tree, j)) |
| 1580 | && validate_yield_or_testlist(CHILD(tree, j + 1)); |
Fred Drake | 28f739a | 2000-08-25 22:42:40 +0000 | [diff] [blame] | 1581 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1582 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1583 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1584 | |
| 1585 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1586 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1587 | validate_del_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1588 | { |
| 1589 | return (validate_numnodes(tree, 2, "del_stmt") |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1590 | && validate_name(CHILD(tree, 0), "del") |
| 1591 | && validate_exprlist(CHILD(tree, 1))); |
| 1592 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1593 | |
| 1594 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1595 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1596 | validate_return_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1597 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1598 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1599 | int res = (validate_ntype(tree, return_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1600 | && ((nch == 1) || (nch == 2)) |
| 1601 | && validate_name(CHILD(tree, 0), "return")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1602 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1603 | if (res && (nch == 2)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1604 | res = validate_testlist(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1605 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1606 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1607 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1608 | |
| 1609 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1610 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1611 | validate_raise_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1612 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1613 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1614 | int res = (validate_ntype(tree, raise_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1615 | && ((nch == 1) || (nch == 2) || (nch == 4) || (nch == 6))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1616 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1617 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1618 | res = validate_name(CHILD(tree, 0), "raise"); |
| 1619 | if (res && (nch >= 2)) |
| 1620 | res = validate_test(CHILD(tree, 1)); |
| 1621 | if (res && nch > 2) { |
| 1622 | res = (validate_comma(CHILD(tree, 2)) |
| 1623 | && validate_test(CHILD(tree, 3))); |
| 1624 | if (res && (nch > 4)) |
| 1625 | res = (validate_comma(CHILD(tree, 4)) |
| 1626 | && validate_test(CHILD(tree, 5))); |
| 1627 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1628 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1629 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1630 | (void) validate_numnodes(tree, 2, "raise"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1631 | if (res && (nch == 4)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1632 | res = (validate_comma(CHILD(tree, 2)) |
| 1633 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1634 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1635 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1636 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1637 | |
| 1638 | |
Phillip J. Eby | 0d6615f | 2005-08-02 00:46:46 +0000 | [diff] [blame] | 1639 | /* yield_expr: 'yield' [testlist] |
| 1640 | */ |
| 1641 | static int |
| 1642 | validate_yield_expr(node *tree) |
| 1643 | { |
| 1644 | int nch = NCH(tree); |
| 1645 | int res = (validate_ntype(tree, yield_expr) |
| 1646 | && ((nch == 1) || (nch == 2)) |
| 1647 | && validate_name(CHILD(tree, 0), "yield")); |
| 1648 | |
| 1649 | if (res && (nch == 2)) |
| 1650 | res = validate_testlist(CHILD(tree, 1)); |
| 1651 | |
| 1652 | return (res); |
| 1653 | } |
| 1654 | |
| 1655 | |
| 1656 | /* yield_stmt: yield_expr |
Fred Drake | 02126f2 | 2001-07-17 02:59:15 +0000 | [diff] [blame] | 1657 | */ |
| 1658 | static int |
| 1659 | validate_yield_stmt(node *tree) |
| 1660 | { |
| 1661 | return (validate_ntype(tree, yield_stmt) |
Phillip J. Eby | 0d6615f | 2005-08-02 00:46:46 +0000 | [diff] [blame] | 1662 | && validate_numnodes(tree, 1, "yield_stmt") |
| 1663 | && validate_yield_expr(CHILD(tree, 0))); |
Fred Drake | 02126f2 | 2001-07-17 02:59:15 +0000 | [diff] [blame] | 1664 | } |
| 1665 | |
| 1666 | |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1667 | static int |
| 1668 | validate_import_as_name(node *tree) |
| 1669 | { |
| 1670 | int nch = NCH(tree); |
| 1671 | int ok = validate_ntype(tree, import_as_name); |
| 1672 | |
| 1673 | if (ok) { |
| 1674 | if (nch == 1) |
| 1675 | ok = validate_name(CHILD(tree, 0), NULL); |
| 1676 | else if (nch == 3) |
| 1677 | ok = (validate_name(CHILD(tree, 0), NULL) |
| 1678 | && validate_name(CHILD(tree, 1), "as") |
| 1679 | && validate_name(CHILD(tree, 2), NULL)); |
| 1680 | else |
| 1681 | ok = validate_numnodes(tree, 3, "import_as_name"); |
| 1682 | } |
| 1683 | return ok; |
| 1684 | } |
| 1685 | |
| 1686 | |
Fred Drake | 7113708 | 2001-01-07 05:59:59 +0000 | [diff] [blame] | 1687 | /* dotted_name: NAME ("." NAME)* |
| 1688 | */ |
| 1689 | static int |
| 1690 | validate_dotted_name(node *tree) |
| 1691 | { |
| 1692 | int nch = NCH(tree); |
| 1693 | int res = (validate_ntype(tree, dotted_name) |
| 1694 | && is_odd(nch) |
| 1695 | && validate_name(CHILD(tree, 0), NULL)); |
| 1696 | int i; |
| 1697 | |
| 1698 | for (i = 1; res && (i < nch); i += 2) { |
| 1699 | res = (validate_dot(CHILD(tree, i)) |
| 1700 | && validate_name(CHILD(tree, i+1), NULL)); |
| 1701 | } |
| 1702 | return res; |
| 1703 | } |
| 1704 | |
| 1705 | |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1706 | /* dotted_as_name: dotted_name [NAME NAME] |
| 1707 | */ |
| 1708 | static int |
| 1709 | validate_dotted_as_name(node *tree) |
| 1710 | { |
| 1711 | int nch = NCH(tree); |
| 1712 | int res = validate_ntype(tree, dotted_as_name); |
| 1713 | |
| 1714 | if (res) { |
| 1715 | if (nch == 1) |
Fred Drake | 7113708 | 2001-01-07 05:59:59 +0000 | [diff] [blame] | 1716 | res = validate_dotted_name(CHILD(tree, 0)); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1717 | else if (nch == 3) |
Fred Drake | 7113708 | 2001-01-07 05:59:59 +0000 | [diff] [blame] | 1718 | res = (validate_dotted_name(CHILD(tree, 0)) |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1719 | && validate_name(CHILD(tree, 1), "as") |
| 1720 | && validate_name(CHILD(tree, 2), NULL)); |
| 1721 | else { |
| 1722 | res = 0; |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 1723 | err_string("illegal number of children for dotted_as_name"); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 1724 | } |
| 1725 | } |
| 1726 | return res; |
| 1727 | } |
| 1728 | |
| 1729 | |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1730 | /* dotted_as_name (',' dotted_as_name)* */ |
| 1731 | static int |
| 1732 | validate_dotted_as_names(node *tree) |
| 1733 | { |
| 1734 | int nch = NCH(tree); |
| 1735 | int res = is_odd(nch) && validate_dotted_as_name(CHILD(tree, 0)); |
| 1736 | int i; |
| 1737 | |
| 1738 | for (i = 1; res && (i < nch); i += 2) |
| 1739 | res = (validate_comma(CHILD(tree, i)) |
| 1740 | && validate_dotted_as_name(CHILD(tree, i + 1))); |
| 1741 | return (res); |
| 1742 | } |
| 1743 | |
| 1744 | |
| 1745 | /* import_as_name (',' import_as_name)* [','] */ |
| 1746 | static int |
| 1747 | validate_import_as_names(node *tree) |
| 1748 | { |
| 1749 | int nch = NCH(tree); |
| 1750 | int res = validate_import_as_name(CHILD(tree, 0)); |
| 1751 | int i; |
| 1752 | |
| 1753 | for (i = 1; res && (i + 1 < nch); i += 2) |
| 1754 | res = (validate_comma(CHILD(tree, i)) |
| 1755 | && validate_import_as_name(CHILD(tree, i + 1))); |
| 1756 | return (res); |
| 1757 | } |
| 1758 | |
| 1759 | |
| 1760 | /* 'import' dotted_as_names */ |
| 1761 | static int |
| 1762 | validate_import_name(node *tree) |
| 1763 | { |
| 1764 | return (validate_ntype(tree, import_name) |
| 1765 | && validate_numnodes(tree, 2, "import_name") |
| 1766 | && validate_name(CHILD(tree, 0), "import") |
| 1767 | && validate_dotted_as_names(CHILD(tree, 1))); |
| 1768 | } |
| 1769 | |
Thomas Wouters | f7f438b | 2006-02-28 16:09:29 +0000 | [diff] [blame] | 1770 | /* Helper function to count the number of leading dots in |
| 1771 | * 'from ...module import name' |
| 1772 | */ |
| 1773 | static int |
| 1774 | count_from_dots(node *tree) |
| 1775 | { |
| 1776 | int i; |
| 1777 | for (i = 0; i < NCH(tree); i++) |
| 1778 | if (TYPE(CHILD(tree, i)) != DOT) |
| 1779 | break; |
| 1780 | return i; |
| 1781 | } |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1782 | |
Thomas Wouters | f7f438b | 2006-02-28 16:09:29 +0000 | [diff] [blame] | 1783 | /* 'from' ('.'* dotted_name | '.') 'import' ('*' | '(' import_as_names ')' | |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1784 | * import_as_names |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1785 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1786 | static int |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1787 | validate_import_from(node *tree) |
| 1788 | { |
| 1789 | int nch = NCH(tree); |
Thomas Wouters | f7f438b | 2006-02-28 16:09:29 +0000 | [diff] [blame] | 1790 | int ndots = count_from_dots(tree); |
| 1791 | int havename = (TYPE(CHILD(tree, ndots + 1)) == dotted_name); |
| 1792 | int offset = ndots + havename; |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1793 | int res = validate_ntype(tree, import_from) |
Thomas Wouters | f7f438b | 2006-02-28 16:09:29 +0000 | [diff] [blame] | 1794 | && (nch >= 4 + ndots) |
| 1795 | && validate_name(CHILD(tree, 0), "from") |
| 1796 | && (!havename || validate_dotted_name(CHILD(tree, ndots + 1))) |
| 1797 | && validate_name(CHILD(tree, offset + 1), "import"); |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1798 | |
Thomas Wouters | f7f438b | 2006-02-28 16:09:29 +0000 | [diff] [blame] | 1799 | if (res && TYPE(CHILD(tree, offset + 2)) == LPAR) |
| 1800 | res = ((nch == offset + 5) |
| 1801 | && validate_lparen(CHILD(tree, offset + 2)) |
| 1802 | && validate_import_as_names(CHILD(tree, offset + 3)) |
| 1803 | && validate_rparen(CHILD(tree, offset + 4))); |
| 1804 | else if (res && TYPE(CHILD(tree, offset + 2)) != STAR) |
| 1805 | res = validate_import_as_names(CHILD(tree, offset + 2)); |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1806 | return (res); |
| 1807 | } |
| 1808 | |
| 1809 | |
| 1810 | /* import_stmt: import_name | import_from */ |
| 1811 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1812 | validate_import_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1813 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1814 | int nch = NCH(tree); |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1815 | int res = validate_numnodes(tree, 1, "import_stmt"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1816 | |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1817 | if (res) { |
| 1818 | int ntype = TYPE(CHILD(tree, 0)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1819 | |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1820 | if (ntype == import_name || ntype == import_from) |
| 1821 | res = validate_node(CHILD(tree, 0)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1822 | else { |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1823 | res = 0; |
| 1824 | err_string("illegal import_stmt child type"); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1825 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1826 | } |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1827 | else if (nch == 1) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1828 | res = 0; |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1829 | PyErr_Format(parser_error, |
| 1830 | "Unrecognized child node of import_stmt: %d.", |
| 1831 | TYPE(CHILD(tree, 0))); |
| 1832 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1833 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1834 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1835 | |
| 1836 | |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 1837 | |
| 1838 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1839 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1840 | validate_global_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1841 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1842 | int j; |
| 1843 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1844 | int res = (validate_ntype(tree, global_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1845 | && is_even(nch) && (nch >= 2)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1846 | |
Michael W. Hudson | df1252d | 2003-02-08 18:05:10 +0000 | [diff] [blame] | 1847 | if (!res && !PyErr_Occurred()) |
| 1848 | err_string("illegal global statement"); |
| 1849 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1850 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1851 | res = (validate_name(CHILD(tree, 0), "global") |
| 1852 | && validate_ntype(CHILD(tree, 1), NAME)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1853 | for (j = 2; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1854 | res = (validate_comma(CHILD(tree, j)) |
| 1855 | && validate_ntype(CHILD(tree, j + 1), NAME)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1856 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1857 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1858 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1859 | |
| 1860 | |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1861 | /* assert_stmt: |
| 1862 | * |
| 1863 | * 'assert' test [',' test] |
| 1864 | */ |
| 1865 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1866 | validate_assert_stmt(node *tree) |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1867 | { |
| 1868 | int nch = NCH(tree); |
| 1869 | int res = (validate_ntype(tree, assert_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1870 | && ((nch == 2) || (nch == 4)) |
Michael W. Hudson | df1252d | 2003-02-08 18:05:10 +0000 | [diff] [blame] | 1871 | && (validate_name(CHILD(tree, 0), "assert")) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1872 | && validate_test(CHILD(tree, 1))); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1873 | |
| 1874 | if (!res && !PyErr_Occurred()) |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 1875 | err_string("illegal assert statement"); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1876 | if (res && (nch > 2)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1877 | res = (validate_comma(CHILD(tree, 2)) |
| 1878 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1879 | |
| 1880 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1881 | } |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1882 | |
| 1883 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1884 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1885 | validate_while(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1886 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1887 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1888 | int res = (validate_ntype(tree, while_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1889 | && ((nch == 4) || (nch == 7)) |
| 1890 | && validate_name(CHILD(tree, 0), "while") |
| 1891 | && validate_test(CHILD(tree, 1)) |
| 1892 | && validate_colon(CHILD(tree, 2)) |
| 1893 | && validate_suite(CHILD(tree, 3))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1894 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1895 | if (res && (nch == 7)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1896 | res = (validate_name(CHILD(tree, 4), "else") |
| 1897 | && validate_colon(CHILD(tree, 5)) |
| 1898 | && validate_suite(CHILD(tree, 6))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1899 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1900 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1901 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1902 | |
| 1903 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1904 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1905 | validate_for(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1906 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1907 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1908 | int res = (validate_ntype(tree, for_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1909 | && ((nch == 6) || (nch == 9)) |
| 1910 | && validate_name(CHILD(tree, 0), "for") |
| 1911 | && validate_exprlist(CHILD(tree, 1)) |
| 1912 | && validate_name(CHILD(tree, 2), "in") |
| 1913 | && validate_testlist(CHILD(tree, 3)) |
| 1914 | && validate_colon(CHILD(tree, 4)) |
| 1915 | && validate_suite(CHILD(tree, 5))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1916 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1917 | if (res && (nch == 9)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1918 | res = (validate_name(CHILD(tree, 6), "else") |
| 1919 | && validate_colon(CHILD(tree, 7)) |
| 1920 | && validate_suite(CHILD(tree, 8))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1921 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1922 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1923 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1924 | |
| 1925 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1926 | /* try_stmt: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1927 | * 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1928 | * | 'try' ':' suite 'finally' ':' suite |
| 1929 | * |
| 1930 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1931 | static int |
Peter Schneider-Kamp | 286da3b | 2000-07-10 12:43:58 +0000 | [diff] [blame] | 1932 | validate_try(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1933 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1934 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1935 | int pos = 3; |
| 1936 | int res = (validate_ntype(tree, try_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1937 | && (nch >= 6) && ((nch % 3) == 0)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1938 | |
| 1939 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1940 | res = (validate_name(CHILD(tree, 0), "try") |
| 1941 | && validate_colon(CHILD(tree, 1)) |
| 1942 | && validate_suite(CHILD(tree, 2)) |
| 1943 | && validate_colon(CHILD(tree, nch - 2)) |
| 1944 | && validate_suite(CHILD(tree, nch - 1))); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 1945 | else if (!PyErr_Occurred()) { |
Fred Drake | 22269b5 | 2000-07-03 18:07:43 +0000 | [diff] [blame] | 1946 | const char* name = "except"; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1947 | if (TYPE(CHILD(tree, nch - 3)) != except_clause) |
| 1948 | name = STR(CHILD(tree, nch - 3)); |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 1949 | |
| 1950 | PyErr_Format(parser_error, |
| 1951 | "Illegal number of children for try/%s node.", name); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1952 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1953 | /* Skip past except_clause sections: */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1954 | while (res && (TYPE(CHILD(tree, pos)) == except_clause)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1955 | res = (validate_except_clause(CHILD(tree, pos)) |
| 1956 | && validate_colon(CHILD(tree, pos + 1)) |
| 1957 | && validate_suite(CHILD(tree, pos + 2))); |
| 1958 | pos += 3; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1959 | } |
| 1960 | if (res && (pos < nch)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1961 | res = validate_ntype(CHILD(tree, pos), NAME); |
| 1962 | if (res && (strcmp(STR(CHILD(tree, pos)), "finally") == 0)) |
| 1963 | res = (validate_numnodes(tree, 6, "try/finally") |
| 1964 | && validate_colon(CHILD(tree, 4)) |
| 1965 | && validate_suite(CHILD(tree, 5))); |
| 1966 | else if (res) { |
| 1967 | if (nch == (pos + 3)) { |
| 1968 | res = ((strcmp(STR(CHILD(tree, pos)), "except") == 0) |
| 1969 | || (strcmp(STR(CHILD(tree, pos)), "else") == 0)); |
| 1970 | if (!res) |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 1971 | err_string("illegal trailing triple in try statement"); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1972 | } |
| 1973 | else if (nch == (pos + 6)) { |
| 1974 | res = (validate_name(CHILD(tree, pos), "except") |
| 1975 | && validate_colon(CHILD(tree, pos + 1)) |
| 1976 | && validate_suite(CHILD(tree, pos + 2)) |
| 1977 | && validate_name(CHILD(tree, pos + 3), "else")); |
| 1978 | } |
| 1979 | else |
| 1980 | res = validate_numnodes(tree, pos + 3, "try/except"); |
| 1981 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1982 | } |
| 1983 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1984 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1985 | |
| 1986 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1987 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1988 | validate_except_clause(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1989 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1990 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1991 | int res = (validate_ntype(tree, except_clause) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1992 | && ((nch == 1) || (nch == 2) || (nch == 4)) |
| 1993 | && validate_name(CHILD(tree, 0), "except")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1994 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1995 | if (res && (nch > 1)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1996 | res = validate_test(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1997 | if (res && (nch == 4)) |
Guido van Rossum | b940e11 | 2007-01-10 16:19:56 +0000 | [diff] [blame] | 1998 | res = (validate_name(CHILD(tree, 2), "as") |
| 1999 | && validate_ntype(CHILD(tree, 3), NAME)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2000 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2001 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2002 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2003 | |
| 2004 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2005 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2006 | validate_test(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2007 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2008 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2009 | int res = validate_ntype(tree, test) && is_odd(nch); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2010 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2011 | if (res && (TYPE(CHILD(tree, 0)) == lambdef)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2012 | res = ((nch == 1) |
| 2013 | && validate_lambdef(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2014 | else if (res) { |
Thomas Wouters | e2dd78c | 2006-02-27 16:25:11 +0000 | [diff] [blame] | 2015 | res = validate_or_test(CHILD(tree, 0)); |
| 2016 | res = (res && (nch == 1 || (nch == 5 && |
| 2017 | validate_name(CHILD(tree, 1), "if") && |
| 2018 | validate_or_test(CHILD(tree, 2)) && |
| 2019 | validate_name(CHILD(tree, 3), "else") && |
| 2020 | validate_test(CHILD(tree, 4))))); |
| 2021 | } |
| 2022 | return (res); |
| 2023 | } |
| 2024 | |
| 2025 | static int |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2026 | validate_test_nocond(node *tree) |
Thomas Wouters | e2dd78c | 2006-02-27 16:25:11 +0000 | [diff] [blame] | 2027 | { |
| 2028 | int nch = NCH(tree); |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2029 | int res = validate_ntype(tree, test_nocond) && (nch == 1); |
Thomas Wouters | e2dd78c | 2006-02-27 16:25:11 +0000 | [diff] [blame] | 2030 | |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2031 | if (res && (TYPE(CHILD(tree, 0)) == lambdef_nocond)) |
| 2032 | res = (validate_lambdef_nocond(CHILD(tree, 0))); |
Thomas Wouters | e2dd78c | 2006-02-27 16:25:11 +0000 | [diff] [blame] | 2033 | else if (res) { |
| 2034 | res = (validate_or_test(CHILD(tree, 0))); |
| 2035 | } |
| 2036 | return (res); |
| 2037 | } |
| 2038 | |
| 2039 | static int |
| 2040 | validate_or_test(node *tree) |
| 2041 | { |
| 2042 | int nch = NCH(tree); |
| 2043 | int res = validate_ntype(tree, or_test) && is_odd(nch); |
| 2044 | |
| 2045 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2046 | int pos; |
| 2047 | res = validate_and_test(CHILD(tree, 0)); |
| 2048 | for (pos = 1; res && (pos < nch); pos += 2) |
| 2049 | res = (validate_name(CHILD(tree, pos), "or") |
| 2050 | && validate_and_test(CHILD(tree, pos + 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2051 | } |
| 2052 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2053 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2054 | |
| 2055 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2056 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2057 | validate_and_test(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2058 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2059 | int pos; |
| 2060 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2061 | int res = (validate_ntype(tree, and_test) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2062 | && is_odd(nch) |
| 2063 | && validate_not_test(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2064 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2065 | for (pos = 1; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2066 | res = (validate_name(CHILD(tree, pos), "and") |
| 2067 | && validate_not_test(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2068 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2069 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2070 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2071 | |
| 2072 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2073 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2074 | validate_not_test(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2075 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2076 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2077 | int res = validate_ntype(tree, not_test) && ((nch == 1) || (nch == 2)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2078 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2079 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2080 | if (nch == 2) |
| 2081 | res = (validate_name(CHILD(tree, 0), "not") |
| 2082 | && validate_not_test(CHILD(tree, 1))); |
| 2083 | else if (nch == 1) |
| 2084 | res = validate_comparison(CHILD(tree, 0)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2085 | } |
| 2086 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2087 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2088 | |
| 2089 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2090 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2091 | validate_comparison(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2092 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2093 | int pos; |
| 2094 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2095 | int res = (validate_ntype(tree, comparison) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2096 | && is_odd(nch) |
| 2097 | && validate_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2098 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2099 | for (pos = 1; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2100 | res = (validate_comp_op(CHILD(tree, pos)) |
| 2101 | && validate_expr(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2102 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2103 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2104 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2105 | |
| 2106 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2107 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2108 | validate_comp_op(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2109 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2110 | int res = 0; |
| 2111 | int nch = NCH(tree); |
| 2112 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2113 | if (!validate_ntype(tree, comp_op)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2114 | return (0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2115 | if (nch == 1) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2116 | /* |
| 2117 | * Only child will be a terminal with a well-defined symbolic name |
| 2118 | * or a NAME with a string of either 'is' or 'in' |
| 2119 | */ |
| 2120 | tree = CHILD(tree, 0); |
| 2121 | switch (TYPE(tree)) { |
| 2122 | case LESS: |
| 2123 | case GREATER: |
| 2124 | case EQEQUAL: |
| 2125 | case EQUAL: |
| 2126 | case LESSEQUAL: |
| 2127 | case GREATEREQUAL: |
| 2128 | case NOTEQUAL: |
| 2129 | res = 1; |
| 2130 | break; |
| 2131 | case NAME: |
| 2132 | res = ((strcmp(STR(tree), "in") == 0) |
| 2133 | || (strcmp(STR(tree), "is") == 0)); |
| 2134 | if (!res) { |
Fred Drake | 0ac9b07 | 2000-09-12 21:58:06 +0000 | [diff] [blame] | 2135 | PyErr_Format(parser_error, |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 2136 | "illegal operator '%s'", STR(tree)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2137 | } |
| 2138 | break; |
| 2139 | default: |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 2140 | err_string("illegal comparison operator type"); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2141 | break; |
| 2142 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2143 | } |
Guido van Rossum | a376cc5 | 1996-12-05 23:43:35 +0000 | [diff] [blame] | 2144 | else if ((res = validate_numnodes(tree, 2, "comp_op")) != 0) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2145 | res = (validate_ntype(CHILD(tree, 0), NAME) |
| 2146 | && validate_ntype(CHILD(tree, 1), NAME) |
| 2147 | && (((strcmp(STR(CHILD(tree, 0)), "is") == 0) |
| 2148 | && (strcmp(STR(CHILD(tree, 1)), "not") == 0)) |
| 2149 | || ((strcmp(STR(CHILD(tree, 0)), "not") == 0) |
| 2150 | && (strcmp(STR(CHILD(tree, 1)), "in") == 0)))); |
| 2151 | if (!res && !PyErr_Occurred()) |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 2152 | err_string("unknown comparison operator"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2153 | } |
| 2154 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2155 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2156 | |
| 2157 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2158 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2159 | validate_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2160 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2161 | int j; |
| 2162 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2163 | int res = (validate_ntype(tree, expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2164 | && is_odd(nch) |
| 2165 | && validate_xor_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2166 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2167 | for (j = 2; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2168 | res = (validate_xor_expr(CHILD(tree, j)) |
| 2169 | && validate_vbar(CHILD(tree, j - 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2170 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2171 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2172 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2173 | |
| 2174 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2175 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2176 | validate_xor_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2177 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2178 | int j; |
| 2179 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2180 | int res = (validate_ntype(tree, xor_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2181 | && is_odd(nch) |
| 2182 | && validate_and_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2183 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2184 | for (j = 2; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2185 | res = (validate_circumflex(CHILD(tree, j - 1)) |
| 2186 | && validate_and_expr(CHILD(tree, j))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2187 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2188 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2189 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2190 | |
| 2191 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2192 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2193 | validate_and_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2194 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2195 | int pos; |
| 2196 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2197 | int res = (validate_ntype(tree, and_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2198 | && is_odd(nch) |
| 2199 | && validate_shift_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2200 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2201 | for (pos = 1; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2202 | res = (validate_ampersand(CHILD(tree, pos)) |
| 2203 | && validate_shift_expr(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2204 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2205 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2206 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2207 | |
| 2208 | |
| 2209 | static int |
Peter Schneider-Kamp | 286da3b | 2000-07-10 12:43:58 +0000 | [diff] [blame] | 2210 | validate_chain_two_ops(node *tree, int (*termvalid)(node *), int op1, int op2) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2211 | { |
| 2212 | int pos = 1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2213 | int nch = NCH(tree); |
| 2214 | int res = (is_odd(nch) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2215 | && (*termvalid)(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2216 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2217 | for ( ; res && (pos < nch); pos += 2) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2218 | if (TYPE(CHILD(tree, pos)) != op1) |
| 2219 | res = validate_ntype(CHILD(tree, pos), op2); |
| 2220 | if (res) |
| 2221 | res = (*termvalid)(CHILD(tree, pos + 1)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2222 | } |
| 2223 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2224 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2225 | |
| 2226 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2227 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2228 | validate_shift_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2229 | { |
| 2230 | return (validate_ntype(tree, shift_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2231 | && validate_chain_two_ops(tree, validate_arith_expr, |
| 2232 | LEFTSHIFT, RIGHTSHIFT)); |
| 2233 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2234 | |
| 2235 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2236 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2237 | validate_arith_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2238 | { |
| 2239 | return (validate_ntype(tree, arith_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2240 | && validate_chain_two_ops(tree, validate_term, PLUS, MINUS)); |
| 2241 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2242 | |
| 2243 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2244 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2245 | validate_term(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2246 | { |
| 2247 | int pos = 1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2248 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2249 | int res = (validate_ntype(tree, term) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2250 | && is_odd(nch) |
| 2251 | && validate_factor(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2252 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2253 | for ( ; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2254 | res = (((TYPE(CHILD(tree, pos)) == STAR) |
| 2255 | || (TYPE(CHILD(tree, pos)) == SLASH) |
Michael W. Hudson | 5e83b7a | 2003-01-29 14:20:23 +0000 | [diff] [blame] | 2256 | || (TYPE(CHILD(tree, pos)) == DOUBLESLASH) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2257 | || (TYPE(CHILD(tree, pos)) == PERCENT)) |
| 2258 | && validate_factor(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2259 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2260 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2261 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2262 | |
| 2263 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2264 | /* factor: |
| 2265 | * |
| 2266 | * factor: ('+'|'-'|'~') factor | power |
| 2267 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2268 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2269 | validate_factor(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2270 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2271 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2272 | int res = (validate_ntype(tree, factor) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2273 | && (((nch == 2) |
| 2274 | && ((TYPE(CHILD(tree, 0)) == PLUS) |
| 2275 | || (TYPE(CHILD(tree, 0)) == MINUS) |
| 2276 | || (TYPE(CHILD(tree, 0)) == TILDE)) |
| 2277 | && validate_factor(CHILD(tree, 1))) |
| 2278 | || ((nch == 1) |
| 2279 | && validate_power(CHILD(tree, 0))))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2280 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2281 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2282 | |
| 2283 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2284 | /* power: |
| 2285 | * |
| 2286 | * power: atom trailer* ('**' factor)* |
| 2287 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2288 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2289 | validate_power(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2290 | { |
| 2291 | int pos = 1; |
| 2292 | int nch = NCH(tree); |
| 2293 | int res = (validate_ntype(tree, power) && (nch >= 1) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2294 | && validate_atom(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2295 | |
| 2296 | while (res && (pos < nch) && (TYPE(CHILD(tree, pos)) == trailer)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2297 | res = validate_trailer(CHILD(tree, pos++)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2298 | if (res && (pos < nch)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2299 | if (!is_even(nch - pos)) { |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 2300 | err_string("illegal number of nodes for 'power'"); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2301 | return (0); |
| 2302 | } |
| 2303 | for ( ; res && (pos < (nch - 1)); pos += 2) |
| 2304 | res = (validate_doublestar(CHILD(tree, pos)) |
| 2305 | && validate_factor(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2306 | } |
| 2307 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2308 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2309 | |
| 2310 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2311 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2312 | validate_atom(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2313 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2314 | int pos; |
| 2315 | int nch = NCH(tree); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2316 | int res = validate_ntype(tree, atom); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2317 | |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2318 | if (res && nch < 1) |
| 2319 | res = validate_numnodes(tree, nch+1, "atom"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2320 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2321 | switch (TYPE(CHILD(tree, 0))) { |
| 2322 | case LPAR: |
| 2323 | res = ((nch <= 3) |
| 2324 | && (validate_rparen(CHILD(tree, nch - 1)))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2325 | |
Phillip J. Eby | 0d6615f | 2005-08-02 00:46:46 +0000 | [diff] [blame] | 2326 | if (res && (nch == 3)) { |
| 2327 | if (TYPE(CHILD(tree, 1))==yield_expr) |
| 2328 | res = validate_yield_expr(CHILD(tree, 1)); |
| 2329 | else |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2330 | res = validate_testlist_comp(CHILD(tree, 1)); |
Phillip J. Eby | 0d6615f | 2005-08-02 00:46:46 +0000 | [diff] [blame] | 2331 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2332 | break; |
| 2333 | case LSQB: |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2334 | if (nch == 2) |
| 2335 | res = validate_ntype(CHILD(tree, 1), RSQB); |
| 2336 | else if (nch == 3) |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2337 | res = (validate_testlist_comp(CHILD(tree, 1)) |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2338 | && validate_ntype(CHILD(tree, 2), RSQB)); |
| 2339 | else { |
| 2340 | res = 0; |
| 2341 | err_string("illegal list display atom"); |
| 2342 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2343 | break; |
| 2344 | case LBRACE: |
| 2345 | res = ((nch <= 3) |
| 2346 | && validate_ntype(CHILD(tree, nch - 1), RBRACE)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2347 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2348 | if (res && (nch == 3)) |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2349 | res = validate_dictorsetmaker(CHILD(tree, 1)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2350 | break; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2351 | case NAME: |
| 2352 | case NUMBER: |
| 2353 | res = (nch == 1); |
| 2354 | break; |
| 2355 | case STRING: |
| 2356 | for (pos = 1; res && (pos < nch); ++pos) |
| 2357 | res = validate_ntype(CHILD(tree, pos), STRING); |
| 2358 | break; |
Georg Brandl | 52318d6 | 2006-09-06 07:06:08 +0000 | [diff] [blame] | 2359 | case DOT: |
| 2360 | res = (nch == 3 && |
| 2361 | validate_ntype(CHILD(tree, 1), DOT) && |
| 2362 | validate_ntype(CHILD(tree, 2), DOT)); |
| 2363 | break; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2364 | default: |
| 2365 | res = 0; |
| 2366 | break; |
| 2367 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2368 | } |
| 2369 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2370 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2371 | |
| 2372 | |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2373 | /* testlist_comp: |
| 2374 | * test ( comp_for | (',' test)* [','] ) |
Fred Drake | 85bf3bb | 2000-08-23 15:35:26 +0000 | [diff] [blame] | 2375 | */ |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2376 | static int |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2377 | validate_testlist_comp(node *tree) |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2378 | { |
| 2379 | int nch = NCH(tree); |
| 2380 | int ok = nch; |
| 2381 | |
| 2382 | if (nch == 0) |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2383 | err_string("missing child nodes of testlist_comp"); |
| 2384 | else { |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2385 | ok = validate_test(CHILD(tree, 0)); |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2386 | } |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2387 | |
| 2388 | /* |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2389 | * comp_for | (',' test)* [','] |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2390 | */ |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2391 | if (nch == 2 && TYPE(CHILD(tree, 1)) == comp_for) |
| 2392 | ok = validate_comp_for(CHILD(tree, 1)); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2393 | else { |
| 2394 | /* (',' test)* [','] */ |
| 2395 | int i = 1; |
| 2396 | while (ok && nch - i >= 2) { |
| 2397 | ok = (validate_comma(CHILD(tree, i)) |
| 2398 | && validate_test(CHILD(tree, i+1))); |
Fred Drake | 85bf3bb | 2000-08-23 15:35:26 +0000 | [diff] [blame] | 2399 | i += 2; |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2400 | } |
Fred Drake | 85bf3bb | 2000-08-23 15:35:26 +0000 | [diff] [blame] | 2401 | if (ok && i == nch-1) |
| 2402 | ok = validate_comma(CHILD(tree, i)); |
| 2403 | else if (i != nch) { |
| 2404 | ok = 0; |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2405 | err_string("illegal trailing nodes for testlist_comp"); |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 2406 | } |
| 2407 | } |
| 2408 | return ok; |
| 2409 | } |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2410 | |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2411 | /* decorator: |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 2412 | * '@' dotted_name [ '(' [arglist] ')' ] NEWLINE |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2413 | */ |
| 2414 | static int |
| 2415 | validate_decorator(node *tree) |
| 2416 | { |
| 2417 | int ok; |
| 2418 | int nch = NCH(tree); |
| 2419 | ok = (validate_ntype(tree, decorator) && |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 2420 | (nch == 3 || nch == 5 || nch == 6) && |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2421 | validate_at(CHILD(tree, 0)) && |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 2422 | validate_dotted_name(CHILD(tree, 1)) && |
| 2423 | validate_newline(RCHILD(tree, -1))); |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2424 | |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 2425 | if (ok && nch != 3) { |
| 2426 | ok = (validate_lparen(CHILD(tree, 2)) && |
| 2427 | validate_rparen(RCHILD(tree, -2))); |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2428 | |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 2429 | if (ok && nch == 6) |
| 2430 | ok = validate_arglist(CHILD(tree, 3)); |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2431 | } |
| 2432 | |
| 2433 | return ok; |
| 2434 | } |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 2435 | |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2436 | /* decorators: |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 2437 | * decorator+ |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2438 | */ |
| 2439 | static int |
| 2440 | validate_decorators(node *tree) |
| 2441 | { |
| 2442 | int i, nch, ok; |
| 2443 | nch = NCH(tree); |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 2444 | ok = validate_ntype(tree, decorators) && nch >= 1; |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2445 | |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 2446 | for (i = 0; ok && i < nch; ++i) |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2447 | ok = validate_decorator(CHILD(tree, i)); |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2448 | |
| 2449 | return ok; |
Michael W. Hudson | 0ccff07 | 2004-08-17 17:29:16 +0000 | [diff] [blame] | 2450 | } |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2451 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2452 | /* funcdef: |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2453 | * |
| 2454 | * -6 -5 -4 -3 -2 -1 |
| 2455 | * [decorators] 'def' NAME parameters ':' suite |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2456 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2457 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2458 | validate_funcdef(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2459 | { |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 2460 | int nch = NCH(tree); |
| 2461 | int ok = (validate_ntype(tree, funcdef) |
| 2462 | && ((nch == 5) || (nch == 6)) |
| 2463 | && validate_name(RCHILD(tree, -5), "def") |
| 2464 | && validate_ntype(RCHILD(tree, -4), NAME) |
| 2465 | && validate_colon(RCHILD(tree, -2)) |
| 2466 | && validate_parameters(RCHILD(tree, -3)) |
| 2467 | && validate_suite(RCHILD(tree, -1))); |
| 2468 | |
| 2469 | if (ok && (nch == 6)) |
| 2470 | ok = validate_decorators(CHILD(tree, 0)); |
| 2471 | |
| 2472 | return ok; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2473 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2474 | |
| 2475 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2476 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2477 | validate_lambdef(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2478 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2479 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2480 | int res = (validate_ntype(tree, lambdef) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2481 | && ((nch == 3) || (nch == 4)) |
| 2482 | && validate_name(CHILD(tree, 0), "lambda") |
| 2483 | && validate_colon(CHILD(tree, nch - 2)) |
| 2484 | && validate_test(CHILD(tree, nch - 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2485 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2486 | if (res && (nch == 4)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2487 | res = validate_varargslist(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2488 | else if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2489 | (void) validate_numnodes(tree, 3, "lambdef"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2490 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2491 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2492 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2493 | |
| 2494 | |
Thomas Wouters | e2dd78c | 2006-02-27 16:25:11 +0000 | [diff] [blame] | 2495 | static int |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2496 | validate_lambdef_nocond(node *tree) |
Thomas Wouters | e2dd78c | 2006-02-27 16:25:11 +0000 | [diff] [blame] | 2497 | { |
| 2498 | int nch = NCH(tree); |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2499 | int res = (validate_ntype(tree, lambdef_nocond) |
Thomas Wouters | e2dd78c | 2006-02-27 16:25:11 +0000 | [diff] [blame] | 2500 | && ((nch == 3) || (nch == 4)) |
| 2501 | && validate_name(CHILD(tree, 0), "lambda") |
| 2502 | && validate_colon(CHILD(tree, nch - 2)) |
| 2503 | && validate_test(CHILD(tree, nch - 1))); |
| 2504 | |
| 2505 | if (res && (nch == 4)) |
| 2506 | res = validate_varargslist(CHILD(tree, 1)); |
| 2507 | else if (!res && !PyErr_Occurred()) |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2508 | (void) validate_numnodes(tree, 3, "lambdef_nocond"); |
Thomas Wouters | e2dd78c | 2006-02-27 16:25:11 +0000 | [diff] [blame] | 2509 | |
| 2510 | return (res); |
| 2511 | } |
| 2512 | |
| 2513 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2514 | /* arglist: |
| 2515 | * |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2516 | * (argument ',')* (argument [','] | '*' test [',' '**' test] | '**' test) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2517 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2518 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2519 | validate_arglist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2520 | { |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 2521 | int nch = NCH(tree); |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2522 | int i = 0; |
| 2523 | int ok = 1; |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 2524 | |
| 2525 | if (nch <= 0) |
| 2526 | /* raise the right error from having an invalid number of children */ |
| 2527 | return validate_numnodes(tree, nch + 1, "arglist"); |
| 2528 | |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 2529 | if (nch > 1) { |
| 2530 | for (i=0; i<nch; i++) { |
| 2531 | if (TYPE(CHILD(tree, i)) == argument) { |
| 2532 | node *ch = CHILD(tree, i); |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2533 | if (NCH(ch) == 2 && TYPE(CHILD(ch, 1)) == comp_for) { |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 2534 | err_string("need '(', ')' for generator expression"); |
| 2535 | return 0; |
| 2536 | } |
| 2537 | } |
| 2538 | } |
| 2539 | } |
| 2540 | |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2541 | while (ok && nch-i >= 2) { |
| 2542 | /* skip leading (argument ',') */ |
| 2543 | ok = (validate_argument(CHILD(tree, i)) |
| 2544 | && validate_comma(CHILD(tree, i+1))); |
| 2545 | if (ok) |
| 2546 | i += 2; |
| 2547 | else |
| 2548 | PyErr_Clear(); |
| 2549 | } |
| 2550 | ok = 1; |
| 2551 | if (nch-i > 0) { |
| 2552 | /* |
| 2553 | * argument | '*' test [',' '**' test] | '**' test |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 2554 | */ |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2555 | int sym = TYPE(CHILD(tree, i)); |
| 2556 | |
| 2557 | if (sym == argument) { |
| 2558 | ok = validate_argument(CHILD(tree, i)); |
| 2559 | if (ok && i+1 != nch) { |
| 2560 | err_string("illegal arglist specification" |
| 2561 | " (extra stuff on end)"); |
| 2562 | ok = 0; |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 2563 | } |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2564 | } |
| 2565 | else if (sym == STAR) { |
| 2566 | ok = validate_star(CHILD(tree, i)); |
| 2567 | if (ok && (nch-i == 2)) |
| 2568 | ok = validate_test(CHILD(tree, i+1)); |
| 2569 | else if (ok && (nch-i == 5)) |
| 2570 | ok = (validate_test(CHILD(tree, i+1)) |
| 2571 | && validate_comma(CHILD(tree, i+2)) |
| 2572 | && validate_doublestar(CHILD(tree, i+3)) |
| 2573 | && validate_test(CHILD(tree, i+4))); |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 2574 | else { |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2575 | err_string("illegal use of '*' in arglist"); |
| 2576 | ok = 0; |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 2577 | } |
| 2578 | } |
Fred Drake | cff283c | 2000-08-21 22:24:43 +0000 | [diff] [blame] | 2579 | else if (sym == DOUBLESTAR) { |
| 2580 | if (nch-i == 2) |
| 2581 | ok = (validate_doublestar(CHILD(tree, i)) |
| 2582 | && validate_test(CHILD(tree, i+1))); |
| 2583 | else { |
| 2584 | err_string("illegal use of '**' in arglist"); |
| 2585 | ok = 0; |
| 2586 | } |
| 2587 | } |
| 2588 | else { |
| 2589 | err_string("illegal arglist specification"); |
| 2590 | ok = 0; |
| 2591 | } |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 2592 | } |
| 2593 | return (ok); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2594 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2595 | |
| 2596 | |
| 2597 | |
| 2598 | /* argument: |
| 2599 | * |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2600 | * [test '='] test [comp_for] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2601 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2602 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2603 | validate_argument(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2604 | { |
| 2605 | int nch = NCH(tree); |
| 2606 | int res = (validate_ntype(tree, argument) |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 2607 | && ((nch == 1) || (nch == 2) || (nch == 3)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2608 | && validate_test(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2609 | |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 2610 | if (res && (nch == 2)) |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2611 | res = validate_comp_for(CHILD(tree, 1)); |
Raymond Hettinger | 354433a | 2004-05-19 08:20:33 +0000 | [diff] [blame] | 2612 | else if (res && (nch == 3)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2613 | res = (validate_equal(CHILD(tree, 1)) |
| 2614 | && validate_test(CHILD(tree, 2))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2615 | |
| 2616 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2617 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2618 | |
| 2619 | |
| 2620 | |
| 2621 | /* trailer: |
| 2622 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2623 | * '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2624 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2625 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2626 | validate_trailer(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2627 | { |
| 2628 | int nch = NCH(tree); |
| 2629 | int res = validate_ntype(tree, trailer) && ((nch == 2) || (nch == 3)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2630 | |
| 2631 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2632 | switch (TYPE(CHILD(tree, 0))) { |
| 2633 | case LPAR: |
| 2634 | res = validate_rparen(CHILD(tree, nch - 1)); |
| 2635 | if (res && (nch == 3)) |
| 2636 | res = validate_arglist(CHILD(tree, 1)); |
| 2637 | break; |
| 2638 | case LSQB: |
| 2639 | res = (validate_numnodes(tree, 3, "trailer") |
| 2640 | && validate_subscriptlist(CHILD(tree, 1)) |
| 2641 | && validate_ntype(CHILD(tree, 2), RSQB)); |
| 2642 | break; |
| 2643 | case DOT: |
| 2644 | res = (validate_numnodes(tree, 2, "trailer") |
| 2645 | && validate_ntype(CHILD(tree, 1), NAME)); |
| 2646 | break; |
| 2647 | default: |
| 2648 | res = 0; |
| 2649 | break; |
| 2650 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2651 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2652 | else { |
| 2653 | (void) validate_numnodes(tree, 2, "trailer"); |
| 2654 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2655 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2656 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2657 | |
| 2658 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2659 | /* subscriptlist: |
| 2660 | * |
| 2661 | * subscript (',' subscript)* [','] |
| 2662 | */ |
| 2663 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2664 | validate_subscriptlist(node *tree) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2665 | { |
| 2666 | return (validate_repeating_list(tree, subscriptlist, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2667 | validate_subscript, "subscriptlist")); |
| 2668 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2669 | |
| 2670 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2671 | /* subscript: |
| 2672 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2673 | * '.' '.' '.' | test | [test] ':' [test] [sliceop] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2674 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2675 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2676 | validate_subscript(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2677 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2678 | int offset = 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2679 | int nch = NCH(tree); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2680 | int res = validate_ntype(tree, subscript) && (nch >= 1) && (nch <= 4); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2681 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2682 | if (!res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2683 | if (!PyErr_Occurred()) |
| 2684 | err_string("invalid number of arguments for subscript node"); |
| 2685 | return (0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2686 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2687 | if (TYPE(CHILD(tree, 0)) == DOT) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2688 | /* take care of ('.' '.' '.') possibility */ |
| 2689 | return (validate_numnodes(tree, 3, "subscript") |
| 2690 | && validate_dot(CHILD(tree, 0)) |
| 2691 | && validate_dot(CHILD(tree, 1)) |
| 2692 | && validate_dot(CHILD(tree, 2))); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2693 | if (nch == 1) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2694 | if (TYPE(CHILD(tree, 0)) == test) |
| 2695 | res = validate_test(CHILD(tree, 0)); |
| 2696 | else |
| 2697 | res = validate_colon(CHILD(tree, 0)); |
| 2698 | return (res); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2699 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2700 | /* Must be [test] ':' [test] [sliceop], |
| 2701 | * but at least one of the optional components will |
| 2702 | * be present, but we don't know which yet. |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2703 | */ |
| 2704 | if ((TYPE(CHILD(tree, 0)) != COLON) || (nch == 4)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2705 | res = validate_test(CHILD(tree, 0)); |
| 2706 | offset = 1; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2707 | } |
| 2708 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2709 | res = validate_colon(CHILD(tree, offset)); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2710 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2711 | int rem = nch - ++offset; |
| 2712 | if (rem) { |
| 2713 | if (TYPE(CHILD(tree, offset)) == test) { |
| 2714 | res = validate_test(CHILD(tree, offset)); |
| 2715 | ++offset; |
| 2716 | --rem; |
| 2717 | } |
| 2718 | if (res && rem) |
| 2719 | res = validate_sliceop(CHILD(tree, offset)); |
| 2720 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2721 | } |
| 2722 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2723 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2724 | |
| 2725 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2726 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2727 | validate_sliceop(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2728 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2729 | int nch = NCH(tree); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2730 | int res = ((nch == 1) || validate_numnodes(tree, 2, "sliceop")) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2731 | && validate_ntype(tree, sliceop); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2732 | if (!res && !PyErr_Occurred()) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2733 | res = validate_numnodes(tree, 1, "sliceop"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2734 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2735 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2736 | res = validate_colon(CHILD(tree, 0)); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2737 | if (res && (nch == 2)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2738 | res = validate_test(CHILD(tree, 1)); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2739 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2740 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2741 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2742 | |
| 2743 | |
| 2744 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2745 | validate_exprlist(node *tree) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2746 | { |
| 2747 | return (validate_repeating_list(tree, exprlist, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2748 | validate_expr, "exprlist")); |
| 2749 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2750 | |
| 2751 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2752 | static int |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2753 | validate_dictorsetmaker(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2754 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2755 | int nch = NCH(tree); |
Nick Coghlan | 650f0d0 | 2007-04-15 12:05:43 +0000 | [diff] [blame] | 2756 | int res = (validate_ntype(tree, dictorsetmaker) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2757 | && (nch >= 3) |
| 2758 | && validate_test(CHILD(tree, 0)) |
| 2759 | && validate_colon(CHILD(tree, 1)) |
| 2760 | && validate_test(CHILD(tree, 2))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2761 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2762 | if (res && ((nch % 4) == 0)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2763 | res = validate_comma(CHILD(tree, --nch)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2764 | else if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2765 | res = ((nch % 4) == 3); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2766 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2767 | if (res && (nch > 3)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2768 | int pos = 3; |
| 2769 | /* ( ',' test ':' test )* */ |
| 2770 | while (res && (pos < nch)) { |
| 2771 | res = (validate_comma(CHILD(tree, pos)) |
| 2772 | && validate_test(CHILD(tree, pos + 1)) |
| 2773 | && validate_colon(CHILD(tree, pos + 2)) |
| 2774 | && validate_test(CHILD(tree, pos + 3))); |
| 2775 | pos += 4; |
| 2776 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2777 | } |
| 2778 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2779 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2780 | |
| 2781 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2782 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2783 | validate_eval_input(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2784 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2785 | int pos; |
| 2786 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2787 | int res = (validate_ntype(tree, eval_input) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2788 | && (nch >= 2) |
| 2789 | && validate_testlist(CHILD(tree, 0)) |
| 2790 | && validate_ntype(CHILD(tree, nch - 1), ENDMARKER)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2791 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2792 | for (pos = 1; res && (pos < (nch - 1)); ++pos) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2793 | res = validate_ntype(CHILD(tree, pos), NEWLINE); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2794 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2795 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2796 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2797 | |
| 2798 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2799 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2800 | validate_node(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2801 | { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2802 | int nch = 0; /* num. children on current node */ |
| 2803 | int res = 1; /* result value */ |
| 2804 | node* next = 0; /* node to process after this one */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2805 | |
Martin v. Löwis | b28f6e7 | 2001-06-23 19:55:38 +0000 | [diff] [blame] | 2806 | while (res && (tree != 0)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2807 | nch = NCH(tree); |
| 2808 | next = 0; |
| 2809 | switch (TYPE(tree)) { |
| 2810 | /* |
| 2811 | * Definition nodes. |
| 2812 | */ |
| 2813 | case funcdef: |
| 2814 | res = validate_funcdef(tree); |
| 2815 | break; |
| 2816 | case classdef: |
| 2817 | res = validate_class(tree); |
| 2818 | break; |
| 2819 | /* |
| 2820 | * "Trivial" parse tree nodes. |
| 2821 | * (Why did I call these trivial?) |
| 2822 | */ |
| 2823 | case stmt: |
| 2824 | res = validate_stmt(tree); |
| 2825 | break; |
| 2826 | case small_stmt: |
| 2827 | /* |
Guido van Rossum | 452bf51 | 2007-02-09 05:32:43 +0000 | [diff] [blame] | 2828 | * expr_stmt | del_stmt | pass_stmt | flow_stmt |
Georg Brandl | 7cae87c | 2006-09-06 06:51:57 +0000 | [diff] [blame] | 2829 | * | import_stmt | global_stmt | assert_stmt |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2830 | */ |
| 2831 | res = validate_small_stmt(tree); |
| 2832 | break; |
| 2833 | case flow_stmt: |
| 2834 | res = (validate_numnodes(tree, 1, "flow_stmt") |
| 2835 | && ((TYPE(CHILD(tree, 0)) == break_stmt) |
| 2836 | || (TYPE(CHILD(tree, 0)) == continue_stmt) |
Fred Drake | 02126f2 | 2001-07-17 02:59:15 +0000 | [diff] [blame] | 2837 | || (TYPE(CHILD(tree, 0)) == yield_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2838 | || (TYPE(CHILD(tree, 0)) == return_stmt) |
| 2839 | || (TYPE(CHILD(tree, 0)) == raise_stmt))); |
| 2840 | if (res) |
| 2841 | next = CHILD(tree, 0); |
| 2842 | else if (nch == 1) |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 2843 | err_string("illegal flow_stmt type"); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2844 | break; |
Fred Drake | 02126f2 | 2001-07-17 02:59:15 +0000 | [diff] [blame] | 2845 | case yield_stmt: |
| 2846 | res = validate_yield_stmt(tree); |
| 2847 | break; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2848 | /* |
| 2849 | * Compound statements. |
| 2850 | */ |
| 2851 | case simple_stmt: |
| 2852 | res = validate_simple_stmt(tree); |
| 2853 | break; |
| 2854 | case compound_stmt: |
| 2855 | res = validate_compound_stmt(tree); |
| 2856 | break; |
| 2857 | /* |
Thomas Wouters | 7e47402 | 2000-07-16 12:04:32 +0000 | [diff] [blame] | 2858 | * Fundamental statements. |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2859 | */ |
| 2860 | case expr_stmt: |
| 2861 | res = validate_expr_stmt(tree); |
| 2862 | break; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2863 | case del_stmt: |
| 2864 | res = validate_del_stmt(tree); |
| 2865 | break; |
| 2866 | case pass_stmt: |
| 2867 | res = (validate_numnodes(tree, 1, "pass") |
| 2868 | && validate_name(CHILD(tree, 0), "pass")); |
| 2869 | break; |
| 2870 | case break_stmt: |
| 2871 | res = (validate_numnodes(tree, 1, "break") |
| 2872 | && validate_name(CHILD(tree, 0), "break")); |
| 2873 | break; |
| 2874 | case continue_stmt: |
| 2875 | res = (validate_numnodes(tree, 1, "continue") |
| 2876 | && validate_name(CHILD(tree, 0), "continue")); |
| 2877 | break; |
| 2878 | case return_stmt: |
| 2879 | res = validate_return_stmt(tree); |
| 2880 | break; |
| 2881 | case raise_stmt: |
| 2882 | res = validate_raise_stmt(tree); |
| 2883 | break; |
| 2884 | case import_stmt: |
| 2885 | res = validate_import_stmt(tree); |
| 2886 | break; |
Anthony Baxter | 1a4ddae | 2004-08-31 10:07:13 +0000 | [diff] [blame] | 2887 | case import_name: |
| 2888 | res = validate_import_name(tree); |
| 2889 | break; |
| 2890 | case import_from: |
| 2891 | res = validate_import_from(tree); |
| 2892 | break; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2893 | case global_stmt: |
| 2894 | res = validate_global_stmt(tree); |
| 2895 | break; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2896 | case assert_stmt: |
| 2897 | res = validate_assert_stmt(tree); |
| 2898 | break; |
| 2899 | case if_stmt: |
| 2900 | res = validate_if(tree); |
| 2901 | break; |
| 2902 | case while_stmt: |
| 2903 | res = validate_while(tree); |
| 2904 | break; |
| 2905 | case for_stmt: |
| 2906 | res = validate_for(tree); |
| 2907 | break; |
| 2908 | case try_stmt: |
| 2909 | res = validate_try(tree); |
| 2910 | break; |
| 2911 | case suite: |
| 2912 | res = validate_suite(tree); |
| 2913 | break; |
| 2914 | /* |
| 2915 | * Expression nodes. |
| 2916 | */ |
| 2917 | case testlist: |
| 2918 | res = validate_testlist(tree); |
| 2919 | break; |
Phillip J. Eby | 0d6615f | 2005-08-02 00:46:46 +0000 | [diff] [blame] | 2920 | case yield_expr: |
| 2921 | res = validate_yield_expr(tree); |
| 2922 | break; |
Guido van Rossum | 2d3b986 | 2002-05-24 15:47:06 +0000 | [diff] [blame] | 2923 | case testlist1: |
| 2924 | res = validate_testlist1(tree); |
| 2925 | break; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2926 | case test: |
| 2927 | res = validate_test(tree); |
| 2928 | break; |
| 2929 | case and_test: |
| 2930 | res = validate_and_test(tree); |
| 2931 | break; |
| 2932 | case not_test: |
| 2933 | res = validate_not_test(tree); |
| 2934 | break; |
| 2935 | case comparison: |
| 2936 | res = validate_comparison(tree); |
| 2937 | break; |
| 2938 | case exprlist: |
| 2939 | res = validate_exprlist(tree); |
| 2940 | break; |
| 2941 | case comp_op: |
| 2942 | res = validate_comp_op(tree); |
| 2943 | break; |
| 2944 | case expr: |
| 2945 | res = validate_expr(tree); |
| 2946 | break; |
| 2947 | case xor_expr: |
| 2948 | res = validate_xor_expr(tree); |
| 2949 | break; |
| 2950 | case and_expr: |
| 2951 | res = validate_and_expr(tree); |
| 2952 | break; |
| 2953 | case shift_expr: |
| 2954 | res = validate_shift_expr(tree); |
| 2955 | break; |
| 2956 | case arith_expr: |
| 2957 | res = validate_arith_expr(tree); |
| 2958 | break; |
| 2959 | case term: |
| 2960 | res = validate_term(tree); |
| 2961 | break; |
| 2962 | case factor: |
| 2963 | res = validate_factor(tree); |
| 2964 | break; |
| 2965 | case power: |
| 2966 | res = validate_power(tree); |
| 2967 | break; |
| 2968 | case atom: |
| 2969 | res = validate_atom(tree); |
| 2970 | break; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2971 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2972 | default: |
| 2973 | /* Hopefully never reached! */ |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 2974 | err_string("unrecognized node type"); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2975 | res = 0; |
| 2976 | break; |
| 2977 | } |
| 2978 | tree = next; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2979 | } |
| 2980 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2981 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2982 | |
| 2983 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2984 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2985 | validate_expr_tree(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2986 | { |
| 2987 | int res = validate_eval_input(tree); |
| 2988 | |
| 2989 | if (!res && !PyErr_Occurred()) |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 2990 | err_string("could not validate expression tuple"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2991 | |
| 2992 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2993 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2994 | |
| 2995 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2996 | /* file_input: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2997 | * (NEWLINE | stmt)* ENDMARKER |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2998 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2999 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3000 | validate_file_input(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 3001 | { |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3002 | int j; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 3003 | int nch = NCH(tree) - 1; |
| 3004 | int res = ((nch >= 0) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3005 | && validate_ntype(CHILD(tree, nch), ENDMARKER)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3006 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3007 | for (j = 0; res && (j < nch); ++j) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3008 | if (TYPE(CHILD(tree, j)) == stmt) |
| 3009 | res = validate_stmt(CHILD(tree, j)); |
| 3010 | else |
| 3011 | res = validate_newline(CHILD(tree, j)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3012 | } |
Thomas Wouters | 7e47402 | 2000-07-16 12:04:32 +0000 | [diff] [blame] | 3013 | /* This stays in to prevent any internal failures from getting to the |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3014 | * user. Hopefully, this won't be needed. If a user reports getting |
| 3015 | * this, we have some debugging to do. |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 3016 | */ |
| 3017 | if (!res && !PyErr_Occurred()) |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 3018 | err_string("VALIDATION FAILURE: report this to the maintainer!"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 3019 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3020 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3021 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3022 | |
Michael W. Hudson | df1252d | 2003-02-08 18:05:10 +0000 | [diff] [blame] | 3023 | static int |
| 3024 | validate_encoding_decl(node *tree) |
| 3025 | { |
| 3026 | int nch = NCH(tree); |
| 3027 | int res = ((nch == 1) |
| 3028 | && validate_file_input(CHILD(tree, 0))); |
| 3029 | |
| 3030 | if (!res && !PyErr_Occurred()) |
| 3031 | err_string("Error Parsing encoding_decl"); |
| 3032 | |
| 3033 | return res; |
| 3034 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3035 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3036 | static PyObject* |
| 3037 | pickle_constructor = NULL; |
| 3038 | |
| 3039 | |
| 3040 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3041 | parser__pickler(PyObject *self, PyObject *args) |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3042 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 3043 | NOTE(ARGUNUSED(self)) |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3044 | PyObject *result = NULL; |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3045 | PyObject *st = NULL; |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 3046 | PyObject *empty_dict = NULL; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3047 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3048 | if (PyArg_ParseTuple(args, "O!:_pickler", &PyST_Type, &st)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3049 | PyObject *newargs; |
| 3050 | PyObject *tuple; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3051 | |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 3052 | if ((empty_dict = PyDict_New()) == NULL) |
| 3053 | goto finally; |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3054 | if ((newargs = Py_BuildValue("Oi", st, 1)) == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3055 | goto finally; |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3056 | tuple = parser_st2tuple((PyST_Object*)NULL, newargs, empty_dict); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3057 | if (tuple != NULL) { |
| 3058 | result = Py_BuildValue("O(O)", pickle_constructor, tuple); |
| 3059 | Py_DECREF(tuple); |
| 3060 | } |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 3061 | Py_DECREF(empty_dict); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3062 | Py_DECREF(newargs); |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3063 | } |
| 3064 | finally: |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 3065 | Py_XDECREF(empty_dict); |
| 3066 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3067 | return (result); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3068 | } |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3069 | |
| 3070 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3071 | /* Functions exported by this module. Most of this should probably |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3072 | * be converted into an ST object with methods, but that is better |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3073 | * done directly in Python, allowing subclasses to be created directly. |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 3074 | * We'd really have to write a wrapper around it all anyway to allow |
| 3075 | * inheritance. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3076 | */ |
| 3077 | static PyMethodDef parser_functions[] = { |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3078 | {"ast2tuple", (PyCFunction)parser_st2tuple, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3079 | PyDoc_STR("Creates a tuple-tree representation of an ST.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3080 | {"ast2list", (PyCFunction)parser_st2list, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3081 | PyDoc_STR("Creates a list-tree representation of an ST.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3082 | {"compileast", (PyCFunction)parser_compilest, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3083 | PyDoc_STR("Compiles an ST object into a code object.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3084 | {"compilest", (PyCFunction)parser_compilest, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3085 | PyDoc_STR("Compiles an ST object into a code object.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3086 | {"expr", (PyCFunction)parser_expr, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3087 | PyDoc_STR("Creates an ST object from an expression.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3088 | {"isexpr", (PyCFunction)parser_isexpr, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3089 | PyDoc_STR("Determines if an ST object was created from an expression.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3090 | {"issuite", (PyCFunction)parser_issuite, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3091 | PyDoc_STR("Determines if an ST object was created from a suite.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3092 | {"suite", (PyCFunction)parser_suite, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3093 | PyDoc_STR("Creates an ST object from a suite.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3094 | {"sequence2ast", (PyCFunction)parser_tuple2st, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3095 | PyDoc_STR("Creates an ST object from a tree representation.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3096 | {"sequence2st", (PyCFunction)parser_tuple2st, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3097 | PyDoc_STR("Creates an ST object from a tree representation.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3098 | {"st2tuple", (PyCFunction)parser_st2tuple, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3099 | PyDoc_STR("Creates a tuple-tree representation of an ST.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3100 | {"st2list", (PyCFunction)parser_st2list, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3101 | PyDoc_STR("Creates a list-tree representation of an ST.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3102 | {"tuple2ast", (PyCFunction)parser_tuple2st, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3103 | PyDoc_STR("Creates an ST object from a tree representation.")}, |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3104 | {"tuple2st", (PyCFunction)parser_tuple2st, PUBLIC_METHOD_TYPE, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3105 | PyDoc_STR("Creates an ST object from a tree representation.")}, |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3106 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3107 | /* private stuff: support pickle module */ |
Fred Drake | 13130bc | 2001-08-15 16:44:56 +0000 | [diff] [blame] | 3108 | {"_pickler", (PyCFunction)parser__pickler, METH_VARARGS, |
Neal Norwitz | 200788c | 2002-08-13 22:20:41 +0000 | [diff] [blame] | 3109 | PyDoc_STR("Returns the pickle magic to allow ST objects to be pickled.")}, |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3110 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 3111 | {NULL, NULL, 0, NULL} |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3112 | }; |
| 3113 | |
| 3114 | |
Mark Hammond | 62b1ab1 | 2002-07-23 06:31:15 +0000 | [diff] [blame] | 3115 | PyMODINIT_FUNC initparser(void); /* supply a prototype */ |
Fred Drake | 28f739a | 2000-08-25 22:42:40 +0000 | [diff] [blame] | 3116 | |
Mark Hammond | 62b1ab1 | 2002-07-23 06:31:15 +0000 | [diff] [blame] | 3117 | PyMODINIT_FUNC |
Thomas Wouters | 5c66986 | 2000-07-24 15:49:08 +0000 | [diff] [blame] | 3118 | initparser(void) |
Fred Drake | 28f739a | 2000-08-25 22:42:40 +0000 | [diff] [blame] | 3119 | { |
Fred Drake | 13130bc | 2001-08-15 16:44:56 +0000 | [diff] [blame] | 3120 | PyObject *module, *copyreg; |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3121 | |
| 3122 | PyST_Type.ob_type = &PyType_Type; |
Guido van Rossum | f2b2dac | 1997-01-23 23:29:44 +0000 | [diff] [blame] | 3123 | module = Py_InitModule("parser", parser_functions); |
Neal Norwitz | 1ac754f | 2006-01-19 06:09:39 +0000 | [diff] [blame] | 3124 | if (module == NULL) |
| 3125 | return; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3126 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 3127 | if (parser_error == 0) |
| 3128 | parser_error = PyErr_NewException("parser.ParserError", NULL, NULL); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3129 | |
Tim Peters | 6a62725 | 2003-07-21 14:25:23 +0000 | [diff] [blame] | 3130 | if (parser_error == 0) |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3131 | /* caller will check PyErr_Occurred() */ |
| 3132 | return; |
Tim Peters | 6a62725 | 2003-07-21 14:25:23 +0000 | [diff] [blame] | 3133 | /* CAUTION: The code next used to skip bumping the refcount on |
| 3134 | * parser_error. That's a disaster if initparser() gets called more |
| 3135 | * than once. By incref'ing, we ensure that each module dict that |
| 3136 | * gets created owns its reference to the shared parser_error object, |
| 3137 | * and the file static parser_error vrbl owns a reference too. |
| 3138 | */ |
| 3139 | Py_INCREF(parser_error); |
| 3140 | if (PyModule_AddObject(module, "ParserError", parser_error) != 0) |
| 3141 | return; |
| 3142 | |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3143 | Py_INCREF(&PyST_Type); |
Fred Drake | 13130bc | 2001-08-15 16:44:56 +0000 | [diff] [blame] | 3144 | PyModule_AddObject(module, "ASTType", (PyObject*)&PyST_Type); |
Fred Drake | c2683dd | 2001-07-17 19:32:05 +0000 | [diff] [blame] | 3145 | Py_INCREF(&PyST_Type); |
Fred Drake | 13130bc | 2001-08-15 16:44:56 +0000 | [diff] [blame] | 3146 | PyModule_AddObject(module, "STType", (PyObject*)&PyST_Type); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 3147 | |
Fred Drake | 13130bc | 2001-08-15 16:44:56 +0000 | [diff] [blame] | 3148 | PyModule_AddStringConstant(module, "__copyright__", |
| 3149 | parser_copyright_string); |
| 3150 | PyModule_AddStringConstant(module, "__doc__", |
| 3151 | parser_doc_string); |
| 3152 | PyModule_AddStringConstant(module, "__version__", |
| 3153 | parser_version_string); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 3154 | |
Fred Drake | 78bdb9b | 2001-07-19 20:17:15 +0000 | [diff] [blame] | 3155 | /* Register to support pickling. |
| 3156 | * If this fails, the import of this module will fail because an |
| 3157 | * exception will be raised here; should we clear the exception? |
| 3158 | */ |
Fred Drake | 13130bc | 2001-08-15 16:44:56 +0000 | [diff] [blame] | 3159 | copyreg = PyImport_ImportModule("copy_reg"); |
| 3160 | if (copyreg != NULL) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3161 | PyObject *func, *pickler; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3162 | |
Fred Drake | 13130bc | 2001-08-15 16:44:56 +0000 | [diff] [blame] | 3163 | func = PyObject_GetAttrString(copyreg, "pickle"); |
| 3164 | pickle_constructor = PyObject_GetAttrString(module, "sequence2st"); |
| 3165 | pickler = PyObject_GetAttrString(module, "_pickler"); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3166 | Py_XINCREF(pickle_constructor); |
| 3167 | if ((func != NULL) && (pickle_constructor != NULL) |
| 3168 | && (pickler != NULL)) { |
| 3169 | PyObject *res; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3170 | |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 3171 | res = PyObject_CallFunctionObjArgs(func, &PyST_Type, pickler, |
| 3172 | pickle_constructor, NULL); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3173 | Py_XDECREF(res); |
| 3174 | } |
| 3175 | Py_XDECREF(func); |
Fred Drake | 13130bc | 2001-08-15 16:44:56 +0000 | [diff] [blame] | 3176 | Py_XDECREF(pickle_constructor); |
| 3177 | Py_XDECREF(pickler); |
| 3178 | Py_DECREF(copyreg); |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 3179 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 3180 | } |